{ "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 \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:*:*:*:*:*:*:*:*", "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": [ { "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" } } ] } }