CVE-2022-49904

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-49904", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-01T14:05:17.245Z", "datePublished": "2025-05-01T14:10:48.998Z", "dateUpdated": "2026-05-23T15:23:11.729Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:23:11.729Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet, neigh: Fix null-ptr-deref in neigh_table_clear()\n\nWhen IPv6 module gets initialized but hits an error in the middle,\nkenel panic with:\n\nKASAN: null-ptr-deref in range [0x0000000000000598-0x000000000000059f]\nCPU: 1 PID: 361 Comm: insmod\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nRIP: 0010:__neigh_ifdown.isra.0+0x24b/0x370\nRSP: 0018:ffff888012677908 EFLAGS: 00000202\n...\nCall Trace:\n <TASK>\n neigh_table_clear+0x94/0x2d0\n ndisc_cleanup+0x27/0x40 [ipv6]\n inet6_init+0x21c/0x2cb [ipv6]\n do_one_initcall+0xd3/0x4d0\n do_init_module+0x1ae/0x670\n...\nKernel panic - not syncing: Fatal exception\n\nWhen ipv6 initialization fails, it will try to cleanup and calls:\n\nneigh_table_clear()\n neigh_ifdown(tbl, NULL)\n pneigh_queue_purge(&tbl->proxy_queue, dev_net(dev == NULL))\n # dev_net(NULL) triggers null-ptr-deref.\n\nFix it by passing NULL to pneigh_queue_purge() in neigh_ifdown() if dev\nis NULL, to make kernel not panic immediately."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/neighbour.c"], "versions": [{"version": "9bbaed571c4bf1b62ac8703cb359dc090efc3455", "lessThan": "0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0", "status": "affected", "versionType": "git"}, {"version": "05fdce1ae744dee43c9181fd063c9c0db4f777f2", "lessThan": "b736592de2aa53aee2d48d6b129bc0c892007bbe", "status": "affected", "versionType": "git"}, {"version": "51be9dd391fd25872b95708a0250f2f7722d2d8e", "lessThan": "b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c", "status": "affected", "versionType": "git"}, {"version": "c35adafe42bd6c3bf2aca0a3f523dabc38fc23c8", "lessThan": "1c89642e7f2b7ecc9635610653f5c2f0276c0051", "status": "affected", "versionType": "git"}, {"version": "db6fa03d80ab076238fc806c9925d1f8b9639d1b", "lessThan": "2b45d6d0c41cb9593868e476681efb1aae5078a1", "status": "affected", "versionType": "git"}, {"version": "66ba215cb51323e4e55e38fd5f250e0fae0cbc94", "lessThan": "a99a8ec4c62180c889482a2ff6465033e0743458", "status": "affected", "versionType": "git"}, {"version": "66ba215cb51323e4e55e38fd5f250e0fae0cbc94", "lessThan": "f8017317cb0b279b8ab98b0f3901a2e0ac880dad", "status": "affected", "versionType": "git"}, {"version": "2dd5ed474115150d8175825bc3b56c6385c3a83b", "status": "affected", "versionType": "git"}, {"version": "4.14.292", "lessThan": "4.14.299", "status": "affected", "versionType": "semver"}, {"version": "4.19.257", "lessThan": "4.19.265", "status": "affected", "versionType": "semver"}, {"version": "5.4.212", "lessThan": "5.4.224", "status": "affected", "versionType": "semver"}, {"version": "5.10.141", "lessThan": "5.10.154", "status": "affected", "versionType": "semver"}, {"version": "5.15.65", "lessThan": "5.15.78", "status": "affected", "versionType": "semver"}, {"version": "5.19.7", "lessThan": "5.20", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/neighbour.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.299", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.265", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.224", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.154", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.78", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.8", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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": "4.14.292", "versionEndExcluding": "4.14.299"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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"https://git.kernel.org/stable/c/0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0"}, {"url": "https://git.kernel.org/stable/c/b736592de2aa53aee2d48d6b129bc0c892007bbe"}, {"url": "https://git.kernel.org/stable/c/b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c"}, {"url": "https://git.kernel.org/stable/c/1c89642e7f2b7ecc9635610653f5c2f0276c0051"}, {"url": "https://git.kernel.org/stable/c/2b45d6d0c41cb9593868e476681efb1aae5078a1"}, {"url": "https://git.kernel.org/stable/c/a99a8ec4c62180c889482a2ff6465033e0743458"}, {"url": "https://git.kernel.org/stable/c/f8017317cb0b279b8ab98b0f3901a2e0ac880dad"}], "title": "net, neigh: Fix null-ptr-deref in neigh_table_clear()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-476", "lang": "en", "description": "CWE-476 NULL Pointer Dereference"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-10-01T16:01:29.450409Z", "id": "CVE-2022-49904", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T16:01:32.063Z"}}]}}

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{"title": "net, neigh: Fix null-ptr-deref in neigh_table_clear()", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "9bbaed571c4bf1b62ac8703cb359dc090efc3455", "lessThan": "0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0", "versionType": "git"}, {"status": "affected", "version": "05fdce1ae744dee43c9181fd063c9c0db4f777f2", "lessThan": "b736592de2aa53aee2d48d6b129bc0c892007bbe", "versionType": "git"}, {"status": "affected", "version": "51be9dd391fd25872b95708a0250f2f7722d2d8e", "lessThan": "b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c", "versionType": "git"}, {"status": "affected", "version": "c35adafe42bd6c3bf2aca0a3f523dabc38fc23c8", "lessThan": "1c89642e7f2b7ecc9635610653f5c2f0276c0051", "versionType": "git"}, {"status": "affected", "version": "db6fa03d80ab076238fc806c9925d1f8b9639d1b", "lessThan": "2b45d6d0c41cb9593868e476681efb1aae5078a1", "versionType": "git"}, 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"original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/core/neighbour.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0"}, {"url": "https://git.kernel.org/stable/c/b736592de2aa53aee2d48d6b129bc0c892007bbe"}, {"url": "https://git.kernel.org/stable/c/b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c"}, {"url": "https://git.kernel.org/stable/c/1c89642e7f2b7ecc9635610653f5c2f0276c0051"}, {"url": "https://git.kernel.org/stable/c/2b45d6d0c41cb9593868e476681efb1aae5078a1"}, {"url": "https://git.kernel.org/stable/c/a99a8ec4c62180c889482a2ff6465033e0743458"}, {"url": "https://git.kernel.org/stable/c/f8017317cb0b279b8ab98b0f3901a2e0ac880dad"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet, neigh: Fix null-ptr-deref in neigh_table_clear()\n\nWhen IPv6 module gets initialized but hits an error in the middle,\nkenel panic with:\n\nKASAN: null-ptr-deref in range [0x0000000000000598-0x000000000000059f]\nCPU: 1 PID: 361 Comm: insmod\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nRIP: 0010:__neigh_ifdown.isra.0+0x24b/0x370\nRSP: 0018:ffff888012677908 EFLAGS: 00000202\n...\nCall Trace:\n <TASK>\n neigh_table_clear+0x94/0x2d0\n ndisc_cleanup+0x27/0x40 [ipv6]\n inet6_init+0x21c/0x2cb [ipv6]\n do_one_initcall+0xd3/0x4d0\n do_init_module+0x1ae/0x670\n...\nKernel panic - not syncing: Fatal exception\n\nWhen ipv6 initialization fails, it will try to cleanup and calls:\n\nneigh_table_clear()\n neigh_ifdown(tbl, NULL)\n pneigh_queue_purge(&tbl->proxy_queue, dev_net(dev == NULL))\n # dev_net(NULL) triggers null-ptr-deref.\n\nFix it by passing NULL to pneigh_queue_purge() in neigh_ifdown() if dev\nis NULL, to make kernel not panic immediately."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.19.7"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:23:11.729Z"}}}, "cveMetadata": {"cveId": "CVE-2022-49904", "state": "PUBLISHED", "dateUpdated": "2026-05-23T15:23:11.729Z", "dateReserved": "2025-05-01T14:05:17.245Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-05-01T14:10:48.998Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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"versionType": "git"}, {"lessThan": "a99a8ec4c62180c889482a2ff6465033e0743458", "status": "affected", "version": "66ba215cb51323e4e55e38fd5f250e0fae0cbc94", "versionType": "git"}, {"lessThan": "f8017317cb0b279b8ab98b0f3901a2e0ac880dad", "status": "affected", "version": "66ba215cb51323e4e55e38fd5f250e0fae0cbc94", "versionType": "git"}, {"status": "affected", "version": "2dd5ed474115150d8175825bc3b56c6385c3a83b", "versionType": "git"}, {"lessThan": "4.14.299", "status": "affected", "version": "4.14.292", "versionType": "semver"}, {"lessThan": "4.19.265", "status": "affected", "version": "4.19.257", "versionType": "semver"}, {"lessThan": "5.4.224", "status": "affected", "version": "5.4.212", "versionType": "semver"}, {"lessThan": "5.10.154", "status": "affected", "version": "5.10.141", "versionType": "semver"}, {"lessThan": "5.15.78", "status": "affected", "version": "5.15.65", "versionType": "semver"}, {"lessThan": "5.20", "status": "affected", "version": "5.19.7", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/core/neighbour.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "4.14.*", "status": "unaffected", "version": "4.14.299", "versionType": "semver"}, {"lessThanOrEqual": "4.19.*", "status": "unaffected", "version": "4.19.265", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.224", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.154", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.78", "versionType": "semver"}, {"lessThanOrEqual": "6.0.*", "status": "unaffected", "version": "6.0.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "ACF1943E-656C-440D-81D9-3F3FA23D23B2", "versionEndExcluding": "4.14.299", "versionStartIncluding": "4.14.292", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D2847A4B-743C-483A-AFAA-5F8246CB36C0", "versionEndExcluding": "4.19.265", "versionStartIncluding": "4.19.257", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4E471077-A8B4-46CA-B708-055F12D45483", "versionEndExcluding": "5.4.224", "versionStartIncluding": "5.4.212", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D090B338-9D25-43EA-9557-2C221E1E3C93", "versionEndExcluding": "5.10.154", "versionStartIncluding": "5.10.141", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "AD95DA02-3B8E-44E0-B8B1-CF0DAB5377CD", "versionEndExcluding": "5.15.78", "versionStartIncluding": "5.15.65", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "60F95F94-9031-4778-B2D0-E7A8286B58D1", "versionEndExcluding": "6.0.8", "versionStartIncluding": "5.19.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet, neigh: Fix null-ptr-deref in neigh_table_clear()\n\nWhen IPv6 module gets initialized but hits an error in the middle,\nkenel panic with:\n\nKASAN: null-ptr-deref in range [0x0000000000000598-0x000000000000059f]\nCPU: 1 PID: 361 Comm: insmod\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nRIP: 0010:__neigh_ifdown.isra.0+0x24b/0x370\nRSP: 0018:ffff888012677908 EFLAGS: 00000202\n...\nCall Trace:\n <TASK>\n neigh_table_clear+0x94/0x2d0\n ndisc_cleanup+0x27/0x40 [ipv6]\n inet6_init+0x21c/0x2cb [ipv6]\n do_one_initcall+0xd3/0x4d0\n do_init_module+0x1ae/0x670\n...\nKernel panic - not syncing: Fatal exception\n\nWhen ipv6 initialization fails, it will try to cleanup and calls:\n\nneigh_table_clear()\n neigh_ifdown(tbl, NULL)\n pneigh_queue_purge(&tbl->proxy_queue, dev_net(dev == NULL))\n # dev_net(NULL) triggers null-ptr-deref.\n\nFix it by passing NULL to pneigh_queue_purge() in neigh_ifdown() if dev\nis NULL, to make kernel not panic immediately."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net, neigh: Fix null-ptr-deref en neigh_table_clear() Cuando se inicializa un m\u00f3dulo IPv6 pero se produce un error en el medio, kenel entra en p\u00e1nico con: KASAN: null-ptr-deref en el rango [0x0000000000000598-0x000000000000059f] CPU: 1 PID: 361 Comm: insmod Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:__neigh_ifdown.isra.0+0x24b/0x370 RSP: 0018:ffff888012677908 EFLAGS: 00000202 ... Seguimiento de llamadas: neigh_table_clear+0x94/0x2d0 ndisc_cleanup+0x27/0x40 [ipv6] inet6_init+0x21c/0x2cb [ipv6] do_one_initcall+0xd3/0x4d0 do_init_module+0x1ae/0x670 ... P\u00e1nico del kernel - no sincroniza: Excepci\u00f3n fatal Cuando falla la inicializaci\u00f3n de ipv6, intentar\u00e1 limpiar y llamar\u00e1 a: neigh_table_clear() neigh_ifdown(tbl, NULL) pneigh_queue_purge(&amp;tbl-&gt;proxy_queue, dev_net(dev == NULL)) # dev_net(NULL) activa null-ptr-deref. Corr\u00edjalo pasando NULL a pneigh_queue_purge() en neigh_ifdown() si dev es NULL, para que el kernel no entre en p\u00e1nico inmediatamente."}], "id": "CVE-2022-49904", "lastModified": "2026-06-17T05:19:28.487", "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49904", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T16:01:29.450409Z", "version": "2.0.3"}}]}, "published": "2025-05-01T15:16:15.480", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1c89642e7f2b7ecc9635610653f5c2f0276c0051"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2b45d6d0c41cb9593868e476681efb1aae5078a1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a99a8ec4c62180c889482a2ff6465033e0743458"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b736592de2aa53aee2d48d6b129bc0c892007bbe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f8017317cb0b279b8ab98b0f3901a2e0ac880dad"}], "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: net, neigh: Fix null-ptr-deref in neigh_table_clear()", "id": "2363404", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363404"}, "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-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet, neigh: Fix null-ptr-deref in neigh_table_clear()\nWhen IPv6 module gets initialized but hits an error in the middle,\nkenel panic with:\nKASAN: null-ptr-deref in range [0x0000000000000598-0x000000000000059f]\nCPU: 1 PID: 361 Comm: insmod\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nRIP: 0010:__neigh_ifdown.isra.0+0x24b/0x370\nRSP: 0018:ffff888012677908 EFLAGS: 00000202\n...\nCall Trace:\n<TASK>\nneigh_table_clear+0x94/0x2d0\nndisc_cleanup+0x27/0x40 [ipv6]\ninet6_init+0x21c/0x2cb [ipv6]\ndo_one_initcall+0xd3/0x4d0\ndo_init_module+0x1ae/0x670\n...\nKernel panic - not syncing: Fatal exception\nWhen ipv6 initialization fails, it will try to cleanup and calls:\nneigh_table_clear()\nneigh_ifdown(tbl, NULL)\npneigh_queue_purge(&tbl->proxy_queue, dev_net(dev == NULL))\n# dev_net(NULL) triggers null-ptr-deref.\nFix it by passing NULL to pneigh_queue_purge() in neigh_ifdown() if dev\nis NULL, to make kernel not panic immediately."], "name": "CVE-2022-49904", "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": "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": "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": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49904\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49904\nhttps://lore.kernel.org/linux-cve-announce/2025050102-CVE-2022-49904-5009@gregkh/T"], "threat_severity": "Moderate"}

{}