{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2022-49904",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49904",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-05-01T14:10:48.998Z",
    "updatedAt": "2026-05-23T15:23:11.729Z",
    "importedAt": "2026-10-24T01:56:49.724Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "net, neigh: Fix null-ptr-deref in neigh_table_clear()",
      "summary": "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": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9bbaed571c4bf1b62ac8703cb359dc090efc3455",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0"
            },
            {
              "version": "05fdce1ae744dee43c9181fd063c9c0db4f777f2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b736592de2aa53aee2d48d6b129bc0c892007bbe"
            },
            {
              "version": "51be9dd391fd25872b95708a0250f2f7722d2d8e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c"
            },
            {
              "version": "c35adafe42bd6c3bf2aca0a3f523dabc38fc23c8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1c89642e7f2b7ecc9635610653f5c2f0276c0051"
            },
            {
              "version": "db6fa03d80ab076238fc806c9925d1f8b9639d1b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2b45d6d0c41cb9593868e476681efb1aae5078a1"
            },
            {
              "version": "66ba215cb51323e4e55e38fd5f250e0fae0cbc94",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a99a8ec4c62180c889482a2ff6465033e0743458"
            },
            {
              "version": "66ba215cb51323e4e55e38fd5f250e0fae0cbc94",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f8017317cb0b279b8ab98b0f3901a2e0ac880dad"
            },
            {
              "version": "2dd5ed474115150d8175825bc3b56c6385c3a83b",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.14.292",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.14.299"
            },
            {
              "version": "4.19.257",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.19.265"
            },
            {
              "version": "5.4.212",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.4.224"
            },
            {
              "version": "5.10.141",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.154"
            },
            {
              "version": "5.15.65",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.78"
            },
            {
              "version": "5.19.7",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.20"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.0"
            },
            {
              "version": "4.14.299",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.265",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.224",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.154",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.78",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.0.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "version": "6.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}