CVE-2022-49904 (GCVE-0-2022-49904)
Vulnerability from cvelistv5
Published
2025-05-01 14:10
Modified
2025-10-01 16:01
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net, neigh: Fix null-ptr-deref in neigh_table_clear() When IPv6 module gets initialized but hits an error in the middle, kenel panic with: KASAN: null-ptr-deref in range [0x0000000000000598-0x000000000000059f] CPU: 1 PID: 361 Comm: insmod Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:__neigh_ifdown.isra.0+0x24b/0x370 RSP: 0018:ffff888012677908 EFLAGS: 00000202 ... Call Trace: <TASK> 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 ... Kernel panic - not syncing: Fatal exception When ipv6 initialization fails, it will try to cleanup and calls: neigh_table_clear() neigh_ifdown(tbl, NULL) pneigh_queue_purge(&tbl->proxy_queue, dev_net(dev == NULL)) # dev_net(NULL) triggers null-ptr-deref. Fix it by passing NULL to pneigh_queue_purge() in neigh_ifdown() if dev is NULL, to make kernel not panic immediately.
References
Impacted products
Vendor Product Version
Linux Linux Version: 9bbaed571c4bf1b62ac8703cb359dc090efc3455
Version: 05fdce1ae744dee43c9181fd063c9c0db4f777f2
Version: 51be9dd391fd25872b95708a0250f2f7722d2d8e
Version: c35adafe42bd6c3bf2aca0a3f523dabc38fc23c8
Version: db6fa03d80ab076238fc806c9925d1f8b9639d1b
Version: 66ba215cb51323e4e55e38fd5f250e0fae0cbc94
Version: 66ba215cb51323e4e55e38fd5f250e0fae0cbc94
Version: 2dd5ed474115150d8175825bc3b56c6385c3a83b
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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(\u0026amp;tbl-\u0026gt;proxy_queue, dev_net(dev == NULL)) # dev_net(NULL) activa null-ptr-deref. 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    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T12:45:24.097Z\"}, \"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 \u003cTASK\u003e\\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(\u0026tbl-\u003eproxy_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\"}]}, {\"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:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"4.19.257\", \"versionEndExcluding\": \"4.19.265\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.4.212\", \"versionEndExcluding\": \"5.4.224\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.10.141\", \"versionEndExcluding\": \"5.10.154\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.15.65\", \"versionEndExcluding\": \"5.15.78\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.0\", \"versionEndExcluding\": \"6.0.8\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.0\", \"versionEndExcluding\": \"6.1\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.19.7\"}]}]}], \"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\"}], \"title\": \"net, neigh: Fix null-ptr-deref in neigh_table_clear()\", \"x_generator\": {\"engine\": \"bippy-1.2.0\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"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\": {\"id\": \"CVE-2022-49904\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T16:01:29.450409Z\"}}}], \"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\": \"2025-10-01T14:22:34.831Z\"}}]}",
      "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\": \"2025-10-01T16:01:32.063Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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