{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47175", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-25T09:12:14.111Z", "datePublished": "2024-03-25T09:16:25.995Z", "dateUpdated": "2025-05-04T07:05:40.350Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:05:40.350Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fq_pie: fix OOB access in the traffic path\n\nthe following script:\n\n # tc qdisc add dev eth0 handle 0x1 root fq_pie flows 2\n # tc qdisc add dev eth0 clsact\n # tc filter add dev eth0 egress matchall action skbedit priority 0x10002\n # ping 192.0.2.2 -I eth0 -c2 -w1 -q\n\nproduces the following splat:\n\n BUG: KASAN: slab-out-of-bounds in fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\n Read of size 4 at addr ffff888171306924 by task ping/942\n\n CPU: 3 PID: 942 Comm: ping Not tainted 5.12.0+ #441\n Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014\n Call Trace:\n dump_stack+0x92/0xc1\n print_address_description.constprop.7+0x1a/0x150\n kasan_report.cold.13+0x7f/0x111\n fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\n __dev_queue_xmit+0x1034/0x2b10\n ip_finish_output2+0xc62/0x2120\n __ip_finish_output+0x553/0xea0\n ip_output+0x1ca/0x4d0\n ip_send_skb+0x37/0xa0\n raw_sendmsg+0x1c4b/0x2d00\n sock_sendmsg+0xdb/0x110\n __sys_sendto+0x1d7/0x2b0\n __x64_sys_sendto+0xdd/0x1b0\n do_syscall_64+0x3c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7fe69735c3eb\n Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89\n RSP: 002b:00007fff06d7fb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\n RAX: ffffffffffffffda RBX: 000055e961413700 RCX: 00007fe69735c3eb\n RDX: 0000000000000040 RSI: 000055e961413700 RDI: 0000000000000003\n RBP: 0000000000000040 R08: 000055e961410500 R09: 0000000000000010\n R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff06d81260\n R13: 00007fff06d7fb40 R14: 00007fff06d7fc30 R15: 000055e96140f0a0\n\n Allocated by task 917:\n kasan_save_stack+0x19/0x40\n __kasan_kmalloc+0x7f/0xa0\n __kmalloc_node+0x139/0x280\n fq_pie_init+0x555/0x8e8 [sch_fq_pie]\n qdisc_create+0x407/0x11b0\n tc_modify_qdisc+0x3c2/0x17e0\n rtnetlink_rcv_msg+0x346/0x8e0\n netlink_rcv_skb+0x120/0x380\n netlink_unicast+0x439/0x630\n netlink_sendmsg+0x719/0xbf0\n sock_sendmsg+0xe2/0x110\n ____sys_sendmsg+0x5ba/0x890\n ___sys_sendmsg+0xe9/0x160\n __sys_sendmsg+0xd3/0x170\n do_syscall_64+0x3c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n The buggy address belongs to the object at ffff888171306800\n which belongs to the cache kmalloc-256 of size 256\n The buggy address is located 36 bytes to the right of\n 256-byte region [ffff888171306800, ffff888171306900)\n The buggy address belongs to the page:\n page:00000000bcfb624e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x171306\n head:00000000bcfb624e order:1 compound_mapcount:0\n flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\n raw: 0017ffffc0010200 dead000000000100 dead000000000122 ffff888100042b40\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ffff888171306800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff888171306880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc\n >ffff888171306900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ^\n ffff888171306980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ffff888171306a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\nfix fq_pie traffic path to avoid selecting 'q->flows + q->flows_cnt' as a\nvalid flow: it's an address beyond the allocated memory."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/sch_fq_pie.c"], "versions": [{"version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a", "lessThan": "e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c", "status": "affected", "versionType": "git"}, {"version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a", "lessThan": "7a1bdec12e43e29cc34a4394590337069d8812ce", "status": "affected", "versionType": "git"}, {"version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a", "lessThan": "e70f7a11876a1a788ceadf75e9e5f7af2c868680", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/sch_fq_pie.c"], "versions": [{"version": "5.6", "status": "affected"}, {"version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.42", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.9", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.10.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.12.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c"}, {"url": "https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce"}, {"url": "https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680"}], "title": "net/sched: fq_pie: fix OOB access in the traffic path", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47175", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-03-28T18:24:58.134002Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:14:58.740Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.980Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680", "tags": ["x_transferred"]}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.980Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47175", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-03-28T18:24:58.134002Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-05-23T19:01:19.885Z"}, "title": "CISA ADP Vulnrichment"}], "cna": {"title": "net/sched: fq_pie: fix OOB access in the traffic path", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a", "lessThan": "e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c", "versionType": "git"}, {"status": "affected", "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a", "lessThan": "7a1bdec12e43e29cc34a4394590337069d8812ce", "versionType": "git"}, {"status": "affected", "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a", "lessThan": "e70f7a11876a1a788ceadf75e9e5f7af2c868680", "versionType": "git"}], "programFiles": ["net/sched/sch_fq_pie.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.6"}, {"status": "unaffected", "version": "0", "lessThan": "5.6", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.42", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.12.9", "versionType": "semver", "lessThanOrEqual": "5.12.*"}, {"status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/sched/sch_fq_pie.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c"}, {"url": "https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce"}, {"url": "https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fq_pie: fix OOB access in the traffic path\n\nthe following script:\n\n # tc qdisc add dev eth0 handle 0x1 root fq_pie flows 2\n # tc qdisc add dev eth0 clsact\n # tc filter add dev eth0 egress matchall action skbedit priority 0x10002\n # ping 192.0.2.2 -I eth0 -c2 -w1 -q\n\nproduces the following splat:\n\n BUG: KASAN: slab-out-of-bounds in fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\n Read of size 4 at addr ffff888171306924 by task ping/942\n\n CPU: 3 PID: 942 Comm: ping Not tainted 5.12.0+ #441\n Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014\n Call Trace:\n dump_stack+0x92/0xc1\n print_address_description.constprop.7+0x1a/0x150\n kasan_report.cold.13+0x7f/0x111\n fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\n __dev_queue_xmit+0x1034/0x2b10\n ip_finish_output2+0xc62/0x2120\n __ip_finish_output+0x553/0xea0\n ip_output+0x1ca/0x4d0\n ip_send_skb+0x37/0xa0\n raw_sendmsg+0x1c4b/0x2d00\n sock_sendmsg+0xdb/0x110\n __sys_sendto+0x1d7/0x2b0\n __x64_sys_sendto+0xdd/0x1b0\n do_syscall_64+0x3c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7fe69735c3eb\n Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89\n RSP: 002b:00007fff06d7fb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\n RAX: ffffffffffffffda RBX: 000055e961413700 RCX: 00007fe69735c3eb\n RDX: 0000000000000040 RSI: 000055e961413700 RDI: 0000000000000003\n RBP: 0000000000000040 R08: 000055e961410500 R09: 0000000000000010\n R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff06d81260\n R13: 00007fff06d7fb40 R14: 00007fff06d7fc30 R15: 000055e96140f0a0\n\n Allocated by task 917:\n kasan_save_stack+0x19/0x40\n __kasan_kmalloc+0x7f/0xa0\n __kmalloc_node+0x139/0x280\n fq_pie_init+0x555/0x8e8 [sch_fq_pie]\n qdisc_create+0x407/0x11b0\n tc_modify_qdisc+0x3c2/0x17e0\n rtnetlink_rcv_msg+0x346/0x8e0\n netlink_rcv_skb+0x120/0x380\n netlink_unicast+0x439/0x630\n netlink_sendmsg+0x719/0xbf0\n sock_sendmsg+0xe2/0x110\n ____sys_sendmsg+0x5ba/0x890\n ___sys_sendmsg+0xe9/0x160\n __sys_sendmsg+0xd3/0x170\n do_syscall_64+0x3c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n The buggy address belongs to the object at ffff888171306800\n which belongs to the cache kmalloc-256 of size 256\n The buggy address is located 36 bytes to the right of\n 256-byte region [ffff888171306800, ffff888171306900)\n The buggy address belongs to the page:\n page:00000000bcfb624e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x171306\n head:00000000bcfb624e order:1 compound_mapcount:0\n flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\n raw: 0017ffffc0010200 dead000000000100 dead000000000122 ffff888100042b40\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ffff888171306800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff888171306880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc\n >ffff888171306900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ^\n ffff888171306980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ffff888171306a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\nfix fq_pie traffic path to avoid selecting 'q->flows + q->flows_cnt' as a\nvalid flow: it's an address beyond the allocated memory."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.42", "versionStartIncluding": "5.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.12.9", "versionStartIncluding": "5.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.13", "versionStartIncluding": "5.6"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:05:40.350Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47175", "state": "PUBLISHED", "dateUpdated": "2025-05-04T07:05:40.350Z", "dateReserved": "2024-03-25T09:12:14.111Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-03-25T09:16:25.995Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E3E2EC44-45C1-4B05-8C62-77FF73DE23CA", "versionEndExcluding": "5.10.42", "versionStartIncluding": "5.6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2C8A1D02-81A7-44E5-ACFD-CC6A6694F930", "versionEndExcluding": "5.12.9", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*", "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*", "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*", "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fq_pie: fix OOB access in the traffic path\n\nthe following script:\n\n # tc qdisc add dev eth0 handle 0x1 root fq_pie flows 2\n # tc qdisc add dev eth0 clsact\n # tc filter add dev eth0 egress matchall action skbedit priority 0x10002\n # ping 192.0.2.2 -I eth0 -c2 -w1 -q\n\nproduces the following splat:\n\n BUG: KASAN: slab-out-of-bounds in fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\n Read of size 4 at addr ffff888171306924 by task ping/942\n\n CPU: 3 PID: 942 Comm: ping Not tainted 5.12.0+ #441\n Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014\n Call Trace:\n dump_stack+0x92/0xc1\n print_address_description.constprop.7+0x1a/0x150\n kasan_report.cold.13+0x7f/0x111\n fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\n __dev_queue_xmit+0x1034/0x2b10\n ip_finish_output2+0xc62/0x2120\n __ip_finish_output+0x553/0xea0\n ip_output+0x1ca/0x4d0\n ip_send_skb+0x37/0xa0\n raw_sendmsg+0x1c4b/0x2d00\n sock_sendmsg+0xdb/0x110\n __sys_sendto+0x1d7/0x2b0\n __x64_sys_sendto+0xdd/0x1b0\n do_syscall_64+0x3c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7fe69735c3eb\n Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89\n RSP: 002b:00007fff06d7fb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\n RAX: ffffffffffffffda RBX: 000055e961413700 RCX: 00007fe69735c3eb\n RDX: 0000000000000040 RSI: 000055e961413700 RDI: 0000000000000003\n RBP: 0000000000000040 R08: 000055e961410500 R09: 0000000000000010\n R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff06d81260\n R13: 00007fff06d7fb40 R14: 00007fff06d7fc30 R15: 000055e96140f0a0\n\n Allocated by task 917:\n kasan_save_stack+0x19/0x40\n __kasan_kmalloc+0x7f/0xa0\n __kmalloc_node+0x139/0x280\n fq_pie_init+0x555/0x8e8 [sch_fq_pie]\n qdisc_create+0x407/0x11b0\n tc_modify_qdisc+0x3c2/0x17e0\n rtnetlink_rcv_msg+0x346/0x8e0\n netlink_rcv_skb+0x120/0x380\n netlink_unicast+0x439/0x630\n netlink_sendmsg+0x719/0xbf0\n sock_sendmsg+0xe2/0x110\n ____sys_sendmsg+0x5ba/0x890\n ___sys_sendmsg+0xe9/0x160\n __sys_sendmsg+0xd3/0x170\n do_syscall_64+0x3c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n The buggy address belongs to the object at ffff888171306800\n which belongs to the cache kmalloc-256 of size 256\n The buggy address is located 36 bytes to the right of\n 256-byte region [ffff888171306800, ffff888171306900)\n The buggy address belongs to the page:\n page:00000000bcfb624e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x171306\n head:00000000bcfb624e order:1 compound_mapcount:0\n flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\n raw: 0017ffffc0010200 dead000000000100 dead000000000122 ffff888100042b40\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ffff888171306800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff888171306880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc\n >ffff888171306900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ^\n ffff888171306980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ffff888171306a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\nfix fq_pie traffic path to avoid selecting 'q->flows + q->flows_cnt' as a\nvalid flow: it's an address beyond the allocated memory."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/sched: fq_pie: arregla el acceso OOB en la ruta de tr\u00e1fico el siguiente script: # tc qdisc add dev eth0 handle 0x1 root fq_pie flows 2 # tc qdisc add dev eth0 clsact # tc filtrar agregar dev eth0 salida matchall acci\u00f3n skbedit prioridad 0x10002 # ping 192.0.2.2 -I eth0 -c2 -w1 -q produce el siguiente s\u00edmbolo: ERROR: KASAN: slab-out-of-bounds in fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie] Leer de tama\u00f1o 4 en la direcci\u00f3n ffff888171306924 por tarea ping/942 CPU: 3 PID: 942 Comm: ping Not tainted 5.12.0+ #441 Nombre de hardware: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+ 0f1aadab 01/04/2014 Seguimiento de llamadas: dump_stack+0x92/0xc1 print_address_description.constprop.7+0x1a/0x150 kasan_report.cold.13+0x7f/0x111 fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie] __dev_queue_x mit+0x1034/0x2b10 ip_finish_output2+0xc62/0x2120 __ip_finish_output+0x553/0xea0 ip_output+0x1ca/0x4d0 ip_send_skb+0x37/0xa0 raw_sendmsg+0x1c4b/0x2d00 sock_sendmsg+0xdb/0x110 __sys_sendto+0x1d7/0x2b0 __x64_sys_s endto+0xdd/0x1b0 do_syscall_64+0x3c/0x80 Entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe69735c3eb C\u00f3digo: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 &lt;48 &gt; 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89 RSP: 002b:00007fff06d7fb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000055e961413700 RCX: 00007fe69735c3eb RDX: 0000000000000040 RSI: 000055e961413700 RDI: 0000000000000003 RBP: 0000000000000040 R08: 000055e961410500 R09: 00000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff06d81260 R13: 00007fff06d7fb40 R14: 00007fff06d7fc30 R15: 000055e96140f0a0 Asignado por la tarea 917: kasan_save_stack+0x19/0x40 __kasan_kmalloc+0x7f/0xa0 __kmalloc_node+0x139/0x280 fq_pie_init+0x555/0x8e8 [ sch_fq_pie] qdisc_create+0x407/0x11b0 tc_modify_qdisc+0x3c2/0x17e0 rtnetlink_rcv_msg+0x346/0x8e0 netlink_rcv_skb+0x120/0x380 netlink_unicast+0x439/0x630 netlink_sendmsg+0x719/ 0xbf0 sock_sendmsg+0xe2/0x110 ____sys_sendmsg+0x5ba/0x890 ___sys_sendmsg+0xe9/0x160 __sys_sendmsg+0xd3 /0x170 do_syscall_64+0x3c/0x80 Entry_SYSCALL_64_after_hwframe+0x44/0xae La direcci\u00f3n con errores pertenece al objeto en ffff888171306800 que pertenece al cach\u00e9 kmalloc-256 de tama\u00f1o 256. La direcci\u00f3n con errores se encuentra 36 bytes a la derecha de la regi\u00f3n de 256 bytes [ffff888171306 800, ffff888171306900) La direcci\u00f3n del error pertenece a la p\u00e1gina: p\u00e1gina:00000000bcfb624e refcount:1 mapcount:0 mapeo:0000000000000000 index:0x0 pfn:0x171306 head:00000000bcfb624e order:1 composite_mapcount:0 flags: 0x17ffffc00 10200(losa|cabeza|nodo=0|zona =2|lastcpupid=0x1fffff) raw: 0017ffffc0010200 dead000000000100 dead000000000122 ffff888100042b40 raw: 000000000000000000 0000000000100010 00000001ffffffff 0000000000000000 p\u00e1gina volcada porque: kasan: se detect\u00f3 mal acceso Estado de la memoria alrededor de la direcci\u00f3n con errores: ffff888171306800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888171306880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc &gt;ffff888171306900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888 171306980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888171306a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb corrige la ruta de tr\u00e1fico fq_pie para evitar seleccionar 'q-&gt;flows + q-&gt;flows_cnt' como un flujo v\u00e1lido: es una direcci\u00f3n m\u00e1s all\u00e1 de la memoria asignada."}], "id": "CVE-2021-47175", "lastModified": "2025-03-17T15:02:54.260", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-03-25T10:15:09.110", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net/sched: fq_pie: fix OOB access in the traffic path", "id": "2271465", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2271465"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/sched: fq_pie: fix OOB access in the traffic path\nthe following script:\n# tc qdisc add dev eth0 handle 0x1 root fq_pie flows 2\n# tc qdisc add dev eth0 clsact\n# tc filter add dev eth0 egress matchall action skbedit priority 0x10002\n# ping 192.0.2.2 -I eth0 -c2 -w1 -q\nproduces the following splat:\nBUG: KASAN: slab-out-of-bounds in fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\nRead of size 4 at addr ffff888171306924 by task ping/942\nCPU: 3 PID: 942 Comm: ping Not tainted 5.12.0+ #441\nHardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014\nCall Trace:\ndump_stack+0x92/0xc1\nprint_address_description.constprop.7+0x1a/0x150\nkasan_report.cold.13+0x7f/0x111\nfq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\n__dev_queue_xmit+0x1034/0x2b10\nip_finish_output2+0xc62/0x2120\n__ip_finish_output+0x553/0xea0\nip_output+0x1ca/0x4d0\nip_send_skb+0x37/0xa0\nraw_sendmsg+0x1c4b/0x2d00\nsock_sendmsg+0xdb/0x110\n__sys_sendto+0x1d7/0x2b0\n__x64_sys_sendto+0xdd/0x1b0\ndo_syscall_64+0x3c/0x80\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7fe69735c3eb\nCode: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89\nRSP: 002b:00007fff06d7fb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\nRAX: ffffffffffffffda RBX: 000055e961413700 RCX: 00007fe69735c3eb\nRDX: 0000000000000040 RSI: 000055e961413700 RDI: 0000000000000003\nRBP: 0000000000000040 R08: 000055e961410500 R09: 0000000000000010\nR10: 0000000000000000 R11: 0000000000000246 R12: 00007fff06d81260\nR13: 00007fff06d7fb40 R14: 00007fff06d7fc30 R15: 000055e96140f0a0\nAllocated by task 917:\nkasan_save_stack+0x19/0x40\n__kasan_kmalloc+0x7f/0xa0\n__kmalloc_node+0x139/0x280\nfq_pie_init+0x555/0x8e8 [sch_fq_pie]\nqdisc_create+0x407/0x11b0\ntc_modify_qdisc+0x3c2/0x17e0\nrtnetlink_rcv_msg+0x346/0x8e0\nnetlink_rcv_skb+0x120/0x380\nnetlink_unicast+0x439/0x630\nnetlink_sendmsg+0x719/0xbf0\nsock_sendmsg+0xe2/0x110\n____sys_sendmsg+0x5ba/0x890\n___sys_sendmsg+0xe9/0x160\n__sys_sendmsg+0xd3/0x170\ndo_syscall_64+0x3c/0x80\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nThe buggy address belongs to the object at ffff888171306800\nwhich belongs to the cache kmalloc-256 of size 256\nThe buggy address is located 36 bytes to the right of\n256-byte region [ffff888171306800, ffff888171306900)\nThe buggy address belongs to the page:\npage:00000000bcfb624e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x171306\nhead:00000000bcfb624e order:1 compound_mapcount:0\nflags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\nraw: 0017ffffc0010200 dead000000000100 dead000000000122 ffff888100042b40\nraw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\nMemory state around the buggy address:\nffff888171306800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\nffff888171306880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc\n>ffff888171306900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n^\nffff888171306980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\nffff888171306a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\nfix fq_pie traffic path to avoid selecting 'q->flows + q->flows_cnt' as a\nvalid flow: it's an address beyond the allocated memory.", "A vulnerability was found in fq_pie module of Linux Kernel impacting net/sched, where an out-of-bounds access during network traffic handling allows attackers to execute arbitrary code leads to DoS."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2021-47175", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47175\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47175\nhttps://lore.kernel.org/linux-cve-announce/2024032537-CVE-2021-47175-5b85@gregkh/T"], "threat_severity": "Moderate"}

{}