CVE-2022-49295

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-49295", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.302Z", "datePublished": "2025-02-26T02:01:25.659Z", "dateUpdated": "2026-08-05T08:54:41.429Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:41.429Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: call genl_unregister_family() first in nbd_cleanup()\n\nOtherwise there may be race between module removal and the handling of\nnetlink command, which can lead to the oops as shown below:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000098\n Oops: 0002 [#1] SMP PTI\n CPU: 1 PID: 31299 Comm: nbd-client Tainted: G E 5.14.0-rc4\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n RIP: 0010:down_write+0x1a/0x50\n Call Trace:\n start_creating+0x89/0x130\n debugfs_create_dir+0x1b/0x130\n nbd_start_device+0x13d/0x390 [nbd]\n nbd_genl_connect+0x42f/0x748 [nbd]\n genl_family_rcv_msg_doit.isra.0+0xec/0x150\n genl_rcv_msg+0xe5/0x1e0\n netlink_rcv_skb+0x55/0x100\n genl_rcv+0x29/0x40\n netlink_unicast+0x1a8/0x250\n netlink_sendmsg+0x21b/0x430\n ____sys_sendmsg+0x2a4/0x2d0\n ___sys_sendmsg+0x81/0xc0\n __sys_sendmsg+0x62/0xb0\n __x64_sys_sendmsg+0x1f/0x30\n do_syscall_64+0x3b/0xc0\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n Modules linked in: nbd(E-)"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached via local Generic Netlink sendmsg to the nbd family (and concurrent local delete_module); it is not reachable from network packets or remote protocols.\nAC:H - Exploitation requires winning a race against nbd module removal (rmmod/delete_module), which an unprivileged attacker cannot initiate and which depends on a privileged actor unloading the module.\nPR:L - NBD_CMD_STATUS has no capability check and is usable by an unprivileged local user, so the cleanup race can be exercised without CAP_SYS_ADMIN; CAP_SYS_ADMIN in init_user_ns is only required for connect/disconnect/reconfigure.\nUI:N - No victim interaction is required; the attacker only needs to send netlink commands while the module exit path runs.\nS:U - Impact remains within the local kernel\u2019s authority; this is not a VM escape, IOMMU bypass, or other cross-boundary breakout.\nC:H - The race is a use-after-free of nbd/debugfs/idr state during teardown, which can be leveraged for disclosure of freed kernel memory contents under the higher-severity UAF scoring rule.\nI:H - The same UAF on kernel objects during module cleanup can be abused for corruption/control-flow hijack primitives, not merely a crash.\nA:H - The documented outcome is a kernel NULL pointer dereference oops during nbd_genl_connect while the module is going away, which is a full availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/nbd.c"], "versions": [{"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "8a1435c862ea09b06be7acda325128dc08458e25", "status": "affected", "versionType": "git"}, {"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c", "status": "affected", "versionType": "git"}, {"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "1be608e1ee1f222464b2856bda9b85ab5184a33e", "status": "affected", "versionType": "git"}, {"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "c0868f6e728c3c28bef0e8bee89d2daf86a8bbca", "status": "affected", "versionType": "git"}, {"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "cbeafa7a79d08ecdb55f8f1d41a11323d0f709db", "status": "affected", "versionType": "git"}, {"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "6f505bbb8063fd3a238a4239d2d8c165e5279f6f", "status": "affected", "versionType": "git"}, {"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "3d5da1ffba3388c2ae2e6c598855a4d887d3bf79", "status": "affected", "versionType": "git"}, {"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "06c4da89c24e7023ea448cadf8e9daf06a0aae6e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/nbd.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.283", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.247", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.198", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.122", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.47", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.17.15", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.4", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19", "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:*:*:*:*:*:*:*:*", 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"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8a1435c862ea09b06be7acda325128dc08458e25"}, {"url": "https://git.kernel.org/stable/c/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c"}, {"url": "https://git.kernel.org/stable/c/1be608e1ee1f222464b2856bda9b85ab5184a33e"}, {"url": "https://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca"}, {"url": "https://git.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db"}, {"url": "https://git.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6f"}, {"url": "https://git.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79"}, {"url": "https://git.kernel.org/stable/c/06c4da89c24e7023ea448cadf8e9daf06a0aae6e"}], "title": "nbd: call genl_unregister_family() first in nbd_cleanup()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-49295", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-01T19:45:04.172443Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T19:46:59.873Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-49295", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-01T19:45:04.172443Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T16:13:07.912Z"}}], "cna": {"title": "nbd: call genl_unregister_family() first in nbd_cleanup()", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached via local Generic Netlink sendmsg to the nbd family (and concurrent local delete_module); it is not reachable from network packets or remote protocols.\nAC:H - Exploitation requires winning a race against nbd module removal (rmmod/delete_module), which an unprivileged attacker cannot initiate and which depends on a privileged actor unloading the module.\nPR:L - NBD_CMD_STATUS has no capability check and is usable by an unprivileged local user, so the cleanup race can be exercised without CAP_SYS_ADMIN; CAP_SYS_ADMIN in init_user_ns is only required for connect/disconnect/reconfigure.\nUI:N - No victim interaction is required; the attacker only needs to send netlink commands while the module exit path runs.\nS:U - Impact remains within the local kernel\u2019s authority; this is not a VM escape, IOMMU bypass, or other cross-boundary breakout.\nC:H - The race is a use-after-free of nbd/debugfs/idr state during teardown, which can be leveraged for disclosure of freed kernel memory contents under the higher-severity UAF scoring rule.\nI:H - The same UAF on kernel objects during module cleanup can be abused for corruption/control-flow hijack primitives, not merely a crash.\nA:H - The documented outcome is a kernel NULL pointer dereference oops during nbd_genl_connect while the module is going away, which is a full availability impact."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "8a1435c862ea09b06be7acda325128dc08458e25", "versionType": "git"}, {"status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c", "versionType": "git"}, {"status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "1be608e1ee1f222464b2856bda9b85ab5184a33e", "versionType": "git"}, {"status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "c0868f6e728c3c28bef0e8bee89d2daf86a8bbca", "versionType": "git"}, {"status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "cbeafa7a79d08ecdb55f8f1d41a11323d0f709db", "versionType": "git"}, {"status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "6f505bbb8063fd3a238a4239d2d8c165e5279f6f", "versionType": "git"}, {"status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "3d5da1ffba3388c2ae2e6c598855a4d887d3bf79", "versionType": "git"}, {"status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "06c4da89c24e7023ea448cadf8e9daf06a0aae6e", "versionType": "git"}], "programFiles": ["drivers/block/nbd.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"status": "unaffected", "version": "0", "lessThan": "4.12", "versionType": "semver"}, {"status": "unaffected", "version": "4.14.283", "versionType": "semver", "lessThanOrEqual": "4.14.*"}, {"status": "unaffected", "version": "4.19.247", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.198", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.122", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.47", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.17.15", "versionType": "semver", "lessThanOrEqual": "5.17.*"}, {"status": "unaffected", "version": "5.18.4", "versionType": "semver", "lessThanOrEqual": "5.18.*"}, {"status": "unaffected", "version": "5.19", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/block/nbd.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/8a1435c862ea09b06be7acda325128dc08458e25"}, {"url": "https://git.kernel.org/stable/c/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c"}, {"url": "https://git.kernel.org/stable/c/1be608e1ee1f222464b2856bda9b85ab5184a33e"}, {"url": "https://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca"}, {"url": "https://git.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db"}, {"url": "https://git.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6f"}, {"url": "https://git.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79"}, {"url": "https://git.kernel.org/stable/c/06c4da89c24e7023ea448cadf8e9daf06a0aae6e"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: call genl_unregister_family() first in nbd_cleanup()\n\nOtherwise there may be race between module removal and the handling of\nnetlink command, which can lead to the oops as shown below:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000098\n Oops: 0002 [#1] SMP PTI\n CPU: 1 PID: 31299 Comm: nbd-client Tainted: G E 5.14.0-rc4\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n RIP: 0010:down_write+0x1a/0x50\n Call Trace:\n start_creating+0x89/0x130\n debugfs_create_dir+0x1b/0x130\n nbd_start_device+0x13d/0x390 [nbd]\n nbd_genl_connect+0x42f/0x748 [nbd]\n genl_family_rcv_msg_doit.isra.0+0xec/0x150\n genl_rcv_msg+0xe5/0x1e0\n netlink_rcv_skb+0x55/0x100\n genl_rcv+0x29/0x40\n netlink_unicast+0x1a8/0x250\n netlink_sendmsg+0x21b/0x430\n ____sys_sendmsg+0x2a4/0x2d0\n ___sys_sendmsg+0x81/0xc0\n __sys_sendmsg+0x62/0xb0\n __x64_sys_sendmsg+0x1f/0x30\n do_syscall_64+0x3b/0xc0\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n Modules linked in: nbd(E-)"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.14.283", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.247", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.198", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.122", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.47", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.17.15", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.18.4", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.19", "versionStartIncluding": "4.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:41.429Z"}}}, "cveMetadata": {"cveId": "CVE-2022-49295", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:54:41.429Z", "dateReserved": "2025-02-26T01:49:39.302Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-02-26T02:01:25.659Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/block/nbd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8a1435c862ea09b06be7acda325128dc08458e25", "status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "versionType": "git"}, {"lessThan": "013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c", "status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "versionType": "git"}, {"lessThan": "1be608e1ee1f222464b2856bda9b85ab5184a33e", "status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "versionType": "git"}, {"lessThan": "c0868f6e728c3c28bef0e8bee89d2daf86a8bbca", "status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "versionType": "git"}, {"lessThan": "cbeafa7a79d08ecdb55f8f1d41a11323d0f709db", "status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "versionType": "git"}, {"lessThan": "6f505bbb8063fd3a238a4239d2d8c165e5279f6f", "status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "versionType": "git"}, {"lessThan": "3d5da1ffba3388c2ae2e6c598855a4d887d3bf79", "status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "versionType": "git"}, {"lessThan": "06c4da89c24e7023ea448cadf8e9daf06a0aae6e", "status": "affected", "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/block/nbd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"lessThan": "4.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "4.14.*", "status": "unaffected", "version": "4.14.283", "versionType": "semver"}, {"lessThanOrEqual": "4.19.*", "status": "unaffected", "version": "4.19.247", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.198", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.122", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.47", "versionType": "semver"}, {"lessThanOrEqual": "5.17.*", "status": "unaffected", "version": "5.17.15", "versionType": "semver"}, {"lessThanOrEqual": "5.18.*", "status": "unaffected", "version": "5.18.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.19", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "42074657-A7B6-4740-88B7-67B440018C1C", "versionEndExcluding": "4.14.283", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B8CFA0F4-2D75-41F4-9753-87944A08B53B", "versionEndExcluding": "4.19.247", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3EC49633-14DE-4EBD-BB80-76AE2E3EABB9", "versionEndExcluding": "5.4.198", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1B42AA01-44D8-4572-95E6-FF8E374CF9C5", "versionEndExcluding": "5.10.122", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FC042EE3-4864-4325-BE0B-4BCDBF11AA61", "versionEndExcluding": "5.15.47", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "53E7AA2E-2FB4-45CA-A22B-08B4EDBB51AD", "versionEndExcluding": "5.17.15", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FA6D643C-6D6A-4821-8A8D-B5776B8F0103", "versionEndExcluding": "5.18.4", "versionStartIncluding": "5.18", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: call genl_unregister_family() first in nbd_cleanup()\n\nOtherwise there may be race between module removal and the handling of\nnetlink command, which can lead to the oops as shown below:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000098\n Oops: 0002 [#1] SMP PTI\n CPU: 1 PID: 31299 Comm: nbd-client Tainted: G E 5.14.0-rc4\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n RIP: 0010:down_write+0x1a/0x50\n Call Trace:\n start_creating+0x89/0x130\n debugfs_create_dir+0x1b/0x130\n nbd_start_device+0x13d/0x390 [nbd]\n nbd_genl_connect+0x42f/0x748 [nbd]\n genl_family_rcv_msg_doit.isra.0+0xec/0x150\n genl_rcv_msg+0xe5/0x1e0\n netlink_rcv_skb+0x55/0x100\n genl_rcv+0x29/0x40\n netlink_unicast+0x1a8/0x250\n netlink_sendmsg+0x21b/0x430\n ____sys_sendmsg+0x2a4/0x2d0\n ___sys_sendmsg+0x81/0xc0\n __sys_sendmsg+0x62/0xb0\n __x64_sys_sendmsg+0x1f/0x30\n do_syscall_64+0x3b/0xc0\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n Modules linked in: nbd(E-)"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nbd: llamar a genl_unregister_family() primero en nbd_cleanup() De lo contrario, puede haber una ejecuci\u00f3n entre la eliminaci\u00f3n del m\u00f3dulo y la gesti\u00f3n del comando netlink, lo que puede provocar los errores que se muestran a continuaci\u00f3n: ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000098 Error: 0002 [#1] SMP PTI CPU: 1 PID: 31299 Comm: nbd-client Contaminado: GE 5.14.0-rc4 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:down_write+0x1a/0x50 Rastreo de llamadas: start_creating+0x89/0x130 debugfs_create_dir+0x1b/0x130 nbd_start_device+0x13d/0x390 [nbd] nbd_genl_connect+0x42f/0x748 [nbd] genl_family_rcv_msg_doit.isra.0+0xec/0x150 genl_rcv_msg+0xe5/0x1e0 netlink_rcv_skb+0x55/0x100 genl_rcv+0x29/0x40 netlink_unicast+0x1a8/0x250 netlink_sendmsg+0x21b/0x430 ____sys_sendmsg+0x2a4/0x2d0 ___sys_sendmsg+0x81/0xc0 __sys_sendmsg+0x62/0xb0 __x64_sys_sendmsg+0x1f/0x30 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae M\u00f3dulos vinculados en: nbd(E-)"}], "id": "CVE-2022-49295", "lastModified": "2026-08-04T10:17:43.723", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49295", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T19:45:04.172443Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:01:06.333", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/06c4da89c24e7023ea448cadf8e9daf06a0aae6e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1be608e1ee1f222464b2856bda9b85ab5184a33e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8a1435c862ea09b06be7acda325128dc08458e25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: nbd: call genl_unregister_family() first in nbd_cleanup()", "id": "2348069", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348069"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnbd: call genl_unregister_family() first in nbd_cleanup()\nOtherwise there may be race between module removal and the handling of\nnetlink command, which can lead to the oops as shown below:\nBUG: kernel NULL pointer dereference, address: 0000000000000098\nOops: 0002 [#1] SMP PTI\nCPU: 1 PID: 31299 Comm: nbd-client Tainted: G E 5.14.0-rc4\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nRIP: 0010:down_write+0x1a/0x50\nCall Trace:\nstart_creating+0x89/0x130\ndebugfs_create_dir+0x1b/0x130\nnbd_start_device+0x13d/0x390 [nbd]\nnbd_genl_connect+0x42f/0x748 [nbd]\ngenl_family_rcv_msg_doit.isra.0+0xec/0x150\ngenl_rcv_msg+0xe5/0x1e0\nnetlink_rcv_skb+0x55/0x100\ngenl_rcv+0x29/0x40\nnetlink_unicast+0x1a8/0x250\nnetlink_sendmsg+0x21b/0x430\n____sys_sendmsg+0x2a4/0x2d0\n___sys_sendmsg+0x81/0xc0\n__sys_sendmsg+0x62/0xb0\n__x64_sys_sendmsg+0x1f/0x30\ndo_syscall_64+0x3b/0xc0\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nModules linked in: nbd(E-)"], "name": "CVE-2022-49295", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49295\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49295\nhttps://git.kernel.org/stable/c/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c\nhttps://git.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79\nhttps://git.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6f\nhttps://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca"], "threat_severity": "Moderate"}

{}