{
  "cveId": "CVE-2022-49904",
  "url": "https://patchblox.com/security/cve/CVE-2022-49904",
  "summary": "CVE-2022-49904 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49904, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net, neigh: Fix null-ptr-deref in neigh_table_cl...",
  "description": "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 \u002B PIIX, 1996) RIP: 0010:__neigh_ifdown.isra.0\u002B0x24b/0x370 RSP: 0018:ffff888012677908 EFLAGS: 00000202 ... Call Trace:  \u003CTASK\u003E  neigh_table_clear\u002B0x94/0x2d0  ndisc_cleanup\u002B0x27/0x40 [ipv6]  inet6_init\u002B0x21c/0x2cb [ipv6]  do_one_initcall\u002B0xd3/0x4d0  do_init_module\u002B0x1ae/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(\u0026tbl-\u003Eproxy_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.",
  "published": "2025-05-01T15:16:15Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00202,
  "epssPercentile": 0.10263,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.0.8-1",
      "fix": "DEBIAN-CVE-2022-49904",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49904",
      "released": "2025-05-01T15:16:15Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.0.8-1",
      "fix": "DEBIAN-CVE-2022-49904",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49904",
      "released": "2025-05-01T15:16:15Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.0.8-1",
      "fix": "DEBIAN-CVE-2022-49904",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49904",
      "released": "2025-05-01T15:16:15Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}