GHSA-R9HR-VQWF-9Q7R

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: tt: avoid request storms during pending request

batadv_send_tt_request() allocates a tt_req_node when none exists for the destination originator node. This should prevent that a multiple TT requests are send at the same time to an originator.

But if allocation of the send buffer failed, this request must be cleaned up again. But indicator for such a failure is "ret == false". But the actual implementation is checking for "ret == true".

The check must be inverted to not loose the information about the TT request directly after it was attempted to be sent out. This should avoid potential request storms.

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-2026-72231"
  ],
  "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: tt: avoid request storms during pending request\n\nbatadv_send_tt_request() allocates a tt_req_node when none exists for the\ndestination originator node. This should prevent that a multiple TT\nrequests are send at the same time to an originator.\n\nBut if allocation of the send buffer failed, this request must be cleaned\nup again. But indicator for such a failure is \"ret == false\". But the\nactual implementation is checking for \"ret == true\".\n\nThe check must be inverted to not loose the information about the TT\nrequest directly after it was attempted to be sent out. This should avoid\npotential request storms.",
  "id": "GHSA-r9hr-vqwf-9q7r",
  "modified": "2026-08-17T06:33:18Z",
  "published": "2026-08-15T06:32:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72231"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/067e413eec2e63c2996909ef55214b3a0eda0be7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21c44a6895f41df811d1c91d10eea194dda2b345"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27c7d40008231ae4140d35501b60087a9de2d2c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e46c76d9a5062212c4c5f642a5549fd9c057f8a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6055695ea40c64a47e00742c12c99b1a33b4daed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a65ac8a81e903bb4b555c1d13532f5cb0167a4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/716f434eb35869e130424331584a91fbb729b9bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aba1cf21954e64c36afb966b754adad2b0b8aa48"
    }
  ],
  "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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