GHSA-H2WR-H6H5-5QFG

Vulnerability from github – Published: 2026-04-25 09:30 – Updated: 2026-04-27 15:30
VLAI
Details

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

netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check()

Reject rt match rules whose addrnr exceeds IP6T_RT_HOPS.

rt_mt6() expects addrnr to stay within the bounds of rtinfo->addrs[]. Validate addrnr during rule installation so malformed rules are rejected before the match logic can use an out-of-range value.

Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-31674"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-25T09:16:00Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check()\n\nReject rt match rules whose addrnr exceeds IP6T_RT_HOPS.\n\nrt_mt6() expects addrnr to stay within the bounds of rtinfo-\u003eaddrs[].\nValidate addrnr during rule installation so malformed rules are rejected\nbefore the match logic can use an out-of-range value.",
  "id": "GHSA-h2wr-h6h5-5qfg",
  "modified": "2026-04-27T15:30:50Z",
  "published": "2026-04-25T09:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31674"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/13e3e30ed3b5b67cc1db2bd58a5d09b0f07debfa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/29ea965a1353bc8303877422f79c8211e9ba9c55"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d3f027327c2fa265f7f85ead41294792c3296ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a28ebf6f99de270d6338ccdc3b49f3e818f99b7b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af9b7e2b765966457f4ec23be5bd34a141f89574"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6a503a9f4debc654e3a6a7ca1f7fce6a9953c59"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d8795fde1f78669a87c87ac29fceab2f104daa8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ded71f5684df16fa645cca5bf4fe6b0cd8a46119"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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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

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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.