GHSA-7J9W-2XG9-R3V4

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-23 15:33
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_conntrack_sip: validate skb_dst() before accessing it

tc ingress and openvswitch do not guarantee routing information to be available. These subsystems use the conntrack helper infrastructure, and the SIP helper relies on the skb_dst() to be present if sip_external_media is set to 1 (which is disabled by default as a module parameter).

This effectively disables the sip_external_media toggle for these subsystems without resulting in a crash.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-72253"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:52Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_sip: validate skb_dst() before accessing it\n\ntc ingress and openvswitch do not guarantee routing information to be\navailable. These subsystems use the conntrack helper infrastructure, and\nthe SIP helper relies on the skb_dst() to be present if\nsip_external_media is set to 1 (which is disabled by default as a module\nparameter).\n\nThis effectively disables the sip_external_media toggle for these\nsubsystems without resulting in a crash.",
  "id": "GHSA-7j9w-2xg9-r3v4",
  "modified": "2026-08-23T15:33:01Z",
  "published": "2026-08-15T06:32:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72253"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09755dc62b026076b1d47f83489eb0547c8135e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0aec339694a56e263d4b22475ff7211d40900830"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7866116a040b3a23fb094e7d8f7ea3d61b3ac70b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b843a96252f672332837ea2ecb7c8db0acf68e20"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c199ed687c00841daf60e9d131976958583a8c09"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c5ef7228be04518d95591fc5369a9c554b19756d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e5e24a365a5e024efef63cc49abb345fbd4852c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e64a48c50a1ff565a98c6a98d82b5b942868e76e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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