GHSA-348F-JXJQ-8XPV

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33
VLAI
Details

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

batman-adv: ensure minimal ethernet header on TX

As documented in commit 8bd67ebb50c0 ("net: bridge: xmit: make sure we have at least eth header len bytes"), it is possible by for a local user with eBPF TC hook access to attach a tc filter which truncates the packet and redirects to an batadv interface. But the code assumes that at least ETH_HLEN bytes are available and thus might read outside of the available buffer.

The batadv_interface_tx() must therefore always check itself if enough data is available for the ethernet header and don't rely on min_header_len.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-72232"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:50Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: ensure minimal ethernet header on TX\n\nAs documented in commit 8bd67ebb50c0 (\"net: bridge: xmit: make sure we have\nat least eth header len bytes\"), it is possible by for a local user with\neBPF TC hook access to attach a tc filter which truncates the packet and\nredirects to an batadv interface. But the code assumes that at least\nETH_HLEN bytes are available and thus might read outside of the available\nbuffer.\n\nThe batadv_interface_tx() must therefore always check itself if enough data\nis available for the ethernet header and don\u0027t rely on min_header_len.",
  "id": "GHSA-348f-jxjq-8xpv",
  "modified": "2026-08-17T06:33:18Z",
  "published": "2026-08-15T06:32:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72232"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/38cd10b0aeec755d89f78722a2b83f4088ff0cb0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49df66b7993c80b80c7eb9a84ba5b3410c8296a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58799078afebd5115e052bf69ad6697f9759dd6f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b4f521e01257387906f8b969ad3450d8208d4e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/811fea37620f2097955d95ce81cfdba03fd30f1b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e16b6751a8206de0b865d99bb02771e6751d12d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dbeb4145d9778f922f459935da9a027750765a69"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6640923afee619d9fa82b07394dc9498e202304"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.