{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-48719", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-20T11:09:39.051Z", "datePublished": "2024-06-20T11:13:11.362Z", "dateUpdated": "2024-09-11T17:34:49.740Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-06-20T11:14:01.652Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work\n\nsyzkaller was able to trigger a deadlock for NTF_MANAGED entries [0]:\n\n kworker/0:16/14617 is trying to acquire lock:\n ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\n [...]\n but task is already holding lock:\n ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572\n\nThe neighbor entry turned to NUD_FAILED state, where __neigh_event_send()\ntriggered an immediate probe as per commit cd28ca0a3dd1 (\"neigh: reduce\narp latency\") via neigh_probe() given table lock was held.\n\nOne option to fix this situation is to defer the neigh_probe() back to\nthe neigh_timer_handler() similarly as pre cd28ca0a3dd1. For the case\nof NTF_MANAGED, this deferral is acceptable given this only happens on\nactual failure state and regular / expected state is NUD_VALID with the\nentry already present.\n\nThe fix adds a parameter to __neigh_event_send() in order to communicate\nwhether immediate probe is allowed or disallowed. Existing call-sites\nof neigh_event_send() default as-is to immediate probe. However, the\nneigh_managed_work() disables it via use of neigh_event_send_probe().\n\n[0] <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_deadlock_bug kernel/locking/lockdep.c:2956 [inline]\n check_deadlock kernel/locking/lockdep.c:2999 [inline]\n validate_chain kernel/locking/lockdep.c:3788 [inline]\n __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027\n lock_acquire kernel/locking/lockdep.c:5639 [inline]\n lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604\n __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline]\n _raw_write_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:334\n ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\n ip6_finish_output2+0x1070/0x14f0 net/ipv6/ip6_output.c:123\n __ip6_finish_output net/ipv6/ip6_output.c:191 [inline]\n __ip6_finish_output+0x61e/0xe90 net/ipv6/ip6_output.c:170\n ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201\n NF_HOOK_COND include/linux/netfilter.h:296 [inline]\n ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224\n dst_output include/net/dst.h:451 [inline]\n NF_HOOK include/linux/netfilter.h:307 [inline]\n ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508\n ndisc_send_ns+0x3a9/0x840 net/ipv6/ndisc.c:650\n ndisc_solicit+0x2cd/0x4f0 net/ipv6/ndisc.c:742\n neigh_probe+0xc2/0x110 net/core/neighbour.c:1040\n __neigh_event_send+0x37d/0x1570 net/core/neighbour.c:1201\n neigh_event_send include/net/neighbour.h:470 [inline]\n neigh_managed_work+0x162/0x250 net/core/neighbour.c:1574\n process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307\n worker_thread+0x657/0x1110 kernel/workqueue.c:2454\n kthread+0x2e9/0x3a0 kernel/kthread.c:377\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\n </TASK>"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/neighbour.h", "net/core/neighbour.c"], "versions": [{"version": "7482e3841d52", "lessThan": "203a35ebb49c", "status": "affected", "versionType": "git"}, {"version": "7482e3841d52", "lessThan": "4a81f6da9cb2", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/neighbour.h", "net/core/neighbour.c"], "versions": [{"version": "5.16", "status": "affected"}, {"version": "0", "lessThan": "5.16", "status": "unaffected", "versionType": "custom"}, {"version": "5.16.8", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/203a35ebb49cdce377416b0690215d3ce090d364"}, {"url": "https://git.kernel.org/stable/c/4a81f6da9cb2d1ef911131a6fd8bd15cb61fc772"}], "title": "net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work", "x_generator": {"engine": "bippy-7d53e8ef8be4"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:24:59.987Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/203a35ebb49cdce377416b0690215d3ce090d364", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/4a81f6da9cb2d1ef911131a6fd8bd15cb61fc772", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-48719", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T17:11:19.414078Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:49.740Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-48719", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-20T11:09:39.051Z", "datePublished": "2024-06-20T11:13:11.362Z", "dateUpdated": "2024-08-03T15:24:59.987Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-06-20T11:14:01.652Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work\n\nsyzkaller was able to trigger a deadlock for NTF_MANAGED entries [0]:\n\n kworker/0:16/14617 is trying to acquire lock:\n ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\n [...]\n but task is already holding lock:\n ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572\n\nThe neighbor entry turned to NUD_FAILED state, where __neigh_event_send()\ntriggered an immediate probe as per commit cd28ca0a3dd1 (\"neigh: reduce\narp latency\") via neigh_probe() given table lock was held.\n\nOne option to fix this situation is to defer the neigh_probe() back to\nthe neigh_timer_handler() similarly as pre cd28ca0a3dd1. For the case\nof NTF_MANAGED, this deferral is acceptable given this only happens on\nactual failure state and regular / expected state is NUD_VALID with the\nentry already present.\n\nThe fix adds a parameter to __neigh_event_send() in order to communicate\nwhether immediate probe is allowed or disallowed. Existing call-sites\nof neigh_event_send() default as-is to immediate probe. However, the\nneigh_managed_work() disables it via use of neigh_event_send_probe().\n\n[0] <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_deadlock_bug kernel/locking/lockdep.c:2956 [inline]\n check_deadlock kernel/locking/lockdep.c:2999 [inline]\n validate_chain kernel/locking/lockdep.c:3788 [inline]\n __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027\n lock_acquire kernel/locking/lockdep.c:5639 [inline]\n lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604\n __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline]\n _raw_write_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:334\n ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\n ip6_finish_output2+0x1070/0x14f0 net/ipv6/ip6_output.c:123\n __ip6_finish_output net/ipv6/ip6_output.c:191 [inline]\n __ip6_finish_output+0x61e/0xe90 net/ipv6/ip6_output.c:170\n ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201\n NF_HOOK_COND include/linux/netfilter.h:296 [inline]\n ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224\n dst_output include/net/dst.h:451 [inline]\n NF_HOOK include/linux/netfilter.h:307 [inline]\n ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508\n ndisc_send_ns+0x3a9/0x840 net/ipv6/ndisc.c:650\n ndisc_solicit+0x2cd/0x4f0 net/ipv6/ndisc.c:742\n neigh_probe+0xc2/0x110 net/core/neighbour.c:1040\n __neigh_event_send+0x37d/0x1570 net/core/neighbour.c:1201\n neigh_event_send include/net/neighbour.h:470 [inline]\n neigh_managed_work+0x162/0x250 net/core/neighbour.c:1574\n process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307\n worker_thread+0x657/0x1110 kernel/workqueue.c:2454\n kthread+0x2e9/0x3a0 kernel/kthread.c:377\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\n </TASK>"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/neighbour.h", "net/core/neighbour.c"], "versions": [{"version": "7482e3841d52", "lessThan": "203a35ebb49c", "status": "affected", "versionType": "git"}, {"version": "7482e3841d52", "lessThan": "4a81f6da9cb2", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/neighbour.h", "net/core/neighbour.c"], "versions": [{"version": "5.16", "status": "affected"}, {"version": "0", "lessThan": "5.16", "status": "unaffected", "versionType": "custom"}, {"version": "5.16.8", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/203a35ebb49cdce377416b0690215d3ce090d364"}, {"url": "https://git.kernel.org/stable/c/4a81f6da9cb2d1ef911131a6fd8bd15cb61fc772"}], "title": "net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work", "x_generator": {"engine": "bippy-7d53e8ef8be4"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-48719", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T17:11:19.414078Z"}}}], "providerMetadata": {"shortName": "CISA-ADP", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "dateUpdated": "2024-09-11T12:42:26.194Z"}, "title": "CISA ADP Vulnrichment"}]}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0623892A-E3E4-44E6-8A5E-39A0B47AF782", "versionEndExcluding": "5.16.8", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:*", "matchCriteriaId": "7BD5F8D9-54FA-4CB0-B4F0-CB0471FDDB2D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:*", "matchCriteriaId": "E6E34B23-78B4-4516-9BD8-61B33F4AC49A", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work\n\nsyzkaller was able to trigger a deadlock for NTF_MANAGED entries [0]:\n\n kworker/0:16/14617 is trying to acquire lock:\n ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\n [...]\n but task is already holding lock:\n ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572\n\nThe neighbor entry turned to NUD_FAILED state, where __neigh_event_send()\ntriggered an immediate probe as per commit cd28ca0a3dd1 (\"neigh: reduce\narp latency\") via neigh_probe() given table lock was held.\n\nOne option to fix this situation is to defer the neigh_probe() back to\nthe neigh_timer_handler() similarly as pre cd28ca0a3dd1. For the case\nof NTF_MANAGED, this deferral is acceptable given this only happens on\nactual failure state and regular / expected state is NUD_VALID with the\nentry already present.\n\nThe fix adds a parameter to __neigh_event_send() in order to communicate\nwhether immediate probe is allowed or disallowed. Existing call-sites\nof neigh_event_send() default as-is to immediate probe. However, the\nneigh_managed_work() disables it via use of neigh_event_send_probe().\n\n[0] <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_deadlock_bug kernel/locking/lockdep.c:2956 [inline]\n check_deadlock kernel/locking/lockdep.c:2999 [inline]\n validate_chain kernel/locking/lockdep.c:3788 [inline]\n __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027\n lock_acquire kernel/locking/lockdep.c:5639 [inline]\n lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604\n __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline]\n _raw_write_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:334\n ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\n ip6_finish_output2+0x1070/0x14f0 net/ipv6/ip6_output.c:123\n __ip6_finish_output net/ipv6/ip6_output.c:191 [inline]\n __ip6_finish_output+0x61e/0xe90 net/ipv6/ip6_output.c:170\n ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201\n NF_HOOK_COND include/linux/netfilter.h:296 [inline]\n ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224\n dst_output include/net/dst.h:451 [inline]\n NF_HOOK include/linux/netfilter.h:307 [inline]\n ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508\n ndisc_send_ns+0x3a9/0x840 net/ipv6/ndisc.c:650\n ndisc_solicit+0x2cd/0x4f0 net/ipv6/ndisc.c:742\n neigh_probe+0xc2/0x110 net/core/neighbour.c:1040\n __neigh_event_send+0x37d/0x1570 net/core/neighbour.c:1201\n neigh_event_send include/net/neighbour.h:470 [inline]\n neigh_managed_work+0x162/0x250 net/core/neighbour.c:1574\n process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307\n worker_thread+0x657/0x1110 kernel/workqueue.c:2454\n kthread+0x2e9/0x3a0 kernel/kthread.c:377\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\n </TASK>"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net, neigh: no activar sondas inmediatas en NUD_FAILED desde neigh_managed_work syzkaller pudo activar un punto muerto para las entradas NTF_MANAGED [0]: kworker/0:16/14617 est\u00e1 intentando adquirir bloqueo: ffffffff8d4dd370 (&amp;tbl-&gt;lock){++-.}-{2:2}, en: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652 [...] pero la tarea ya mantiene el bloqueo: ffffffff8d4dd370 (&amp;tbl-&gt;lock){++-.}-{2:2}, en: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572 La entrada del vecino pas\u00f3 al estado NUD_FAILED, donde __neigh_event_send() desencaden\u00f3 una Sondeo inmediato seg\u00fan el commit cd28ca0a3dd1 (\"relincho: reducir la latencia de arp\") a trav\u00e9s de neigh_probe() dado que se mantuvo el bloqueo de la tabla. Una opci\u00f3n para solucionar esta situaci\u00f3n es posponer neigh_probe() nuevamente a neigh_timer_handler() de manera similar a como se hac\u00eda antes de cd28ca0a3dd1. Para el caso de NTF_MANAGED, este aplazamiento es aceptable dado que esto solo ocurre en el estado de falla real y el estado normal/esperado es NUD_VALID con la entrada ya presente. La soluci\u00f3n agrega un par\u00e1metro a __neigh_event_send() para comunicar si se permite o no la sonda inmediata. Los sitios de llamadas existentes de neigh_event_send() est\u00e1n predeterminados tal cual para la investigaci\u00f3n inmediata. Sin embargo, neigh_managed_work() lo desactiva mediante el uso de neigh_event_send_probe(). [0] __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_deadlock_bug kernel/locking/lockdep.c:2956 [en l\u00ednea] check_deadlock kernel/locking/lockdep.c :2999 [en l\u00ednea] validar_chain kernel/locking/lockdep.c:3788 [en l\u00ednea] __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027 lock_acquire kernel/locking/lockdep.c:5639 [en l\u00ednea] lock_acquire+0x1ab /0x510 kernel/locking/lockdep.c:5604 __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [en l\u00ednea] _raw_write_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:334 ___neigh_create+0x9e1/0x2990 net/core/neighbour.c :652 ip6_finish_output2+0x1070/0x14f0 net/ipv6/ip6_output.c:123 __ip6_finish_output net/ipv6/ip6_output.c:191 [en l\u00ednea] __ip6_finish_output+0x61e/0xe90 net/ipv6/ip6_output.c:170 poner+0x32/0x200 neto/ ipv6/ip6_output.c:201 NF_HOOK_COND include/linux/netfilter.h:296 [en l\u00ednea] ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224 dst_output include/net/dst.h:451 [en l\u00ednea] NF_HOOK include/ linux/netfilter.h:307 [en l\u00ednea] ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508 ndisc_send_ns+0x3a9/0x840 net/ipv6/ndisc.c:650 ndisc_solicit+0x2cd/0x4f0 net/ipv6/ndisc.c :742 neigh_probe+0xc2/0x110 net/core/neighbour.c:1040 __neigh_event_send+0x37d/0x1570 net/core/neighbour.c:1201 neigh_event_send include/net/neighbour.h:470 [en l\u00ednea] neigh_managed_work+0x162/0x250 net/ core/neighbour.c:1574 Process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 trabajador_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/ x86/entry/entry_64.S:295 "}], "id": "CVE-2022-48719", "lastModified": "2024-09-18T16:58:08.113", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-06-20T11:15:55.470", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/203a35ebb49cdce377416b0690215d3ce090d364"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4a81f6da9cb2d1ef911131a6fd8bd15cb61fc772"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work", "id": "2293283", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2293283"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work\nsyzkaller was able to trigger a deadlock for NTF_MANAGED entries [0]:\nkworker/0:16/14617 is trying to acquire lock:\nffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\n[...]\nbut task is already holding lock:\nffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572\nThe neighbor entry turned to NUD_FAILED state, where __neigh_event_send()\ntriggered an immediate probe as per commit cd28ca0a3dd1 (\"neigh: reduce\narp latency\") via neigh_probe() given table lock was held.\nOne option to fix this situation is to defer the neigh_probe() back to\nthe neigh_timer_handler() similarly as pre cd28ca0a3dd1. For the case\nof NTF_MANAGED, this deferral is acceptable given this only happens on\nactual failure state and regular / expected state is NUD_VALID with the\nentry already present.\nThe fix adds a parameter to __neigh_event_send() in order to communicate\nwhether immediate probe is allowed or disallowed. Existing call-sites\nof neigh_event_send() default as-is to immediate probe. However, the\nneigh_managed_work() disables it via use of neigh_event_send_probe().\n[0] <TASK>\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\nprint_deadlock_bug kernel/locking/lockdep.c:2956 [inline]\ncheck_deadlock kernel/locking/lockdep.c:2999 [inline]\nvalidate_chain kernel/locking/lockdep.c:3788 [inline]\n__lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027\nlock_acquire kernel/locking/lockdep.c:5639 [inline]\nlock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604\n__raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline]\n_raw_write_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:334\n___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\nip6_finish_output2+0x1070/0x14f0 net/ipv6/ip6_output.c:123\n__ip6_finish_output net/ipv6/ip6_output.c:191 [inline]\n__ip6_finish_output+0x61e/0xe90 net/ipv6/ip6_output.c:170\nip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201\nNF_HOOK_COND include/linux/netfilter.h:296 [inline]\nip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224\ndst_output include/net/dst.h:451 [inline]\nNF_HOOK include/linux/netfilter.h:307 [inline]\nndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508\nndisc_send_ns+0x3a9/0x840 net/ipv6/ndisc.c:650\nndisc_solicit+0x2cd/0x4f0 net/ipv6/ndisc.c:742\nneigh_probe+0xc2/0x110 net/core/neighbour.c:1040\n__neigh_event_send+0x37d/0x1570 net/core/neighbour.c:1201\nneigh_event_send include/net/neighbour.h:470 [inline]\nneigh_managed_work+0x162/0x250 net/core/neighbour.c:1574\nprocess_one_work+0x9ac/0x1650 kernel/workqueue.c:2307\nworker_thread+0x657/0x1110 kernel/workqueue.c:2454\nkthread+0x2e9/0x3a0 kernel/kthread.c:377\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\n</TASK>"], "name": "CVE-2022-48719", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-06-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-48719\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-48719\nhttps://lore.kernel.org/linux-cve-announce/2024062056-CVE-2022-48719-4312@gregkh/T"], "threat_severity": "Moderate", "upstream_fix": "kernel 5.16.8, kernel 5.17"}