CVE-2022-49904 (GCVE-0-2022-49904)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2026-05-23 15:23
VLAI
Title
net, neigh: Fix null-ptr-deref in neigh_table_clear()
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9bbaed571c4bf1b62ac8703cb359dc090efc3455 , < 0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0 (git)
Affected: 05fdce1ae744dee43c9181fd063c9c0db4f777f2 , < b736592de2aa53aee2d48d6b129bc0c892007bbe (git)
Affected: 51be9dd391fd25872b95708a0250f2f7722d2d8e , < b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c (git)
Affected: c35adafe42bd6c3bf2aca0a3f523dabc38fc23c8 , < 1c89642e7f2b7ecc9635610653f5c2f0276c0051 (git)
Affected: db6fa03d80ab076238fc806c9925d1f8b9639d1b , < 2b45d6d0c41cb9593868e476681efb1aae5078a1 (git)
Affected: 66ba215cb51323e4e55e38fd5f250e0fae0cbc94 , < a99a8ec4c62180c889482a2ff6465033e0743458 (git)
Affected: 66ba215cb51323e4e55e38fd5f250e0fae0cbc94 , < f8017317cb0b279b8ab98b0f3901a2e0ac880dad (git)
Affected: 2dd5ed474115150d8175825bc3b56c6385c3a83b (git)
Affected: 4.14.292 , < 4.14.299 (semver)
Affected: 4.19.257 , < 4.19.265 (semver)
Affected: 5.4.212 , < 5.4.224 (semver)
Affected: 5.10.141 , < 5.10.154 (semver)
Affected: 5.15.65 , < 5.15.78 (semver)
Affected: 5.19.7 , < 5.20 (semver)
Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 4.14.299 , ≤ 4.14.* (semver)
Unaffected: 4.19.265 , ≤ 4.19.* (semver)
Unaffected: 5.4.224 , ≤ 5.4.* (semver)
Unaffected: 5.10.154 , ≤ 5.10.* (semver)
Unaffected: 5.15.78 , ≤ 5.15.* (semver)
Unaffected: 6.0.8 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "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."
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    "dateUpdated": "2026-05-23T15:23:11.729Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49904\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:15.480\",\"lastModified\":\"2026-06-17T05:19:28.487\",\"vulnStatus\":\"Modified\",\"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 \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.\"},{\"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(\u0026amp;tbl-\u0026gt;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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/core/neighbour.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"},{\"version\":\"66ba215cb51323e4e55e38fd5f250e0fae0cbc94\",\"lessThan\":\"a99a8ec4c62180c889482a2ff6465033e0743458\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"66ba215cb51323e4e55e38fd5f250e0fae0cbc94\",\"lessThan\":\"f8017317cb0b279b8ab98b0f3901a2e0ac880dad\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2dd5ed474115150d8175825bc3b56c6385c3a83b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.14.292\",\"lessThan\":\"4.14.299\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.257\",\"lessThan\":\"4.19.265\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.212\",\"lessThan\":\"5.4.224\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.10.141\",\"lessThan\":\"5.10.154\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.65\",\"lessThan\":\"5.15.78\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.19.7\",\"lessThan\":\"5.20\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/core/neighbour.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.0\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.0\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.299\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.265\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.224\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.154\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.78\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.8\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-10-01T16:01:29.450409Z\",\"id\":\"CVE-2022-49904\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.14.292\",\"versionEndExcluding\":\"4.14.299\",\"matchCriteriaId\":\"ACF1943E-656C-440D-81D9-3F3FA23D23B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.257\",\"versionEndExcluding\":\"4.19.265\",\"matchCriteriaId\":\"D2847A4B-743C-483A-AFAA-5F8246CB36C0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.212\",\"versionEndExcluding\":\"5.4.224\",\"matchCriteriaId\":\"4E471077-A8B4-46CA-B708-055F12D45483\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.141\",\"versionEndExcluding\":\"5.10.154\",\"matchCriteriaId\":\"D090B338-9D25-43EA-9557-2C221E1E3C93\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.65\",\"versionEndExcluding\":\"5.15.78\",\"matchCriteriaId\":\"AD95DA02-3B8E-44E0-B8B1-CF0DAB5377CD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.19.7\",\"versionEndExcluding\":\"6.0.8\",\"matchCriteriaId\":\"60F95F94-9031-4778-B2D0-E7A8286B58D1\"},{\"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\"}]}]}],\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:29:59+00:00",
      "cve": "CVE-2022-49904",
      "id": "CVE-2022-49904",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "42",
      "product_status:known_not_affected": "232",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net, neigh: Fix null-ptr-deref in neigh_table_clear()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49904.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"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\": 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\"1c89642e7f2b7ecc9635610653f5c2f0276c0051\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"db6fa03d80ab076238fc806c9925d1f8b9639d1b\", \"lessThan\": \"2b45d6d0c41cb9593868e476681efb1aae5078a1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"66ba215cb51323e4e55e38fd5f250e0fae0cbc94\", \"lessThan\": \"a99a8ec4c62180c889482a2ff6465033e0743458\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"66ba215cb51323e4e55e38fd5f250e0fae0cbc94\", \"lessThan\": \"f8017317cb0b279b8ab98b0f3901a2e0ac880dad\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2dd5ed474115150d8175825bc3b56c6385c3a83b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4.14.292\", \"lessThan\": \"4.14.299\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.19.257\", \"lessThan\": \"4.19.265\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.4.212\", \"lessThan\": 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\"unaffected\", \"version\": \"5.4.224\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.154\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.78\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1\", \"versionType\": \"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 \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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.299\", \"versionStartIncluding\": \"4.14.292\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.265\", \"versionStartIncluding\": \"4.19.257\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.224\", \"versionStartIncluding\": \"5.4.212\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.154\", \"versionStartIncluding\": \"5.10.141\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.78\", \"versionStartIncluding\": \"5.15.65\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.8\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"6.0\"}, {\"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\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.