---
id: CVE-2026-72231
title: |-
  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
summary: |-
  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…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-772
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 <
    6055695ea40c64a47e00742c12c99b1a33b4daed
  - >-
    Linux >= 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 <
    21c44a6895f41df811d1c91d10eea194dda2b345
  - >-
    Linux >= 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 <
    5e46c76d9a5062212c4c5f642a5549fd9c057f8a
  - >-
    Linux >= 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 <
    067e413eec2e63c2996909ef55214b3a0eda0be7
  - >-
    Linux >= 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 <
    716f434eb35869e130424331584a91fbb729b9bd
  - >-
    Linux >= 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 <
    6a65ac8a81e903bb4b555c1d13532f5cb0167a4a
  - >-
    Linux >= 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 <
    aba1cf21954e64c36afb966b754adad2b0b8aa48
  - >-
    Linux >= 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 <
    27c7d40008231ae4140d35501b60087a9de2d2c3
  - Linux 3.13
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:17:15.353'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72231'
references:
  - url: 'https://git.kernel.org/stable/c/067e413eec2e63c2996909ef55214b3a0eda0be7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/21c44a6895f41df811d1c91d10eea194dda2b345'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/27c7d40008231ae4140d35501b60087a9de2d2c3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5e46c76d9a5062212c4c5f642a5549fd9c057f8a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6055695ea40c64a47e00742c12c99b1a33b4daed'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6a65ac8a81e903bb4b555c1d13532f5cb0167a4a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/716f434eb35869e130424331584a91fbb729b9bd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/aba1cf21954e64c36afb966b754adad2b0b8aa48'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72231.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-72231'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2516403'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-72231'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72231'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026081549-CVE-2026-72231-bfeb@gregkh/T
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00677
epssPercentile: 0.52095
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-16T18:44:21.954834Z'
scores:
  nvd: 7.5
  vendor: 5.5
  cna: 7.5
ingestedAt: '2026-10-16T19:46:24.419Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72231.json)