---
id: CVE-2025-37757
title: >-
  In the Linux kernel, the following vulnerability has been resolved:


  tipc: fix memory leak in tipc_link_xmit


  In case the backlog transmit queue for system-importance messages is
  overloaded,

  tipc_link_xmit() returns -ENOBUFS but the skb …
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  tipc: fix memory leak in tipc_link_xmit


  In case the backlog transmit queue for system-importance messages is
  overloaded,

  tipc_link_xmit() returns -ENOBUFS but the skb …
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-401
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.11, < 5.4.293'
  - 'linux_kernel >= 5.5, < 5.10.237'
  - 'linux_kernel >= 5.11, < 5.15.181'
  - 'linux_kernel >= 5.16, < 6.1.135'
  - 'linux_kernel >= 6.2, < 6.6.88'
  - 'linux_kernel >= 6.7, < 6.12.24'
  - 'linux_kernel >= 6.13, < 6.13.12'
  - 'linux_kernel >= 6.14, < 6.14.3'
  - linux_kernel = 6.15
  - debian_linux = 11.0
patched:
  - linux_kernel 6.14.3
published: '2025-05-01'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:18:17.370'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-37757'
references:
  - url: 'https://git.kernel.org/stable/c/09c2dcda2c551bba30710c33f6ac678ae7395389'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/24e6280cdd7f8d01fc6b9b365fb800c2fb7ea9bb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/69ae94725f4fc9e75219d2d69022029c5b24bc9a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7c5957f7905b4aede9d7a559d271438f3ca9e852'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/84895f5ce3829d9fc030e5ec2d8729da4c0c9d08'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a40cbfbb8f95c325430f017883da669b2aa927d4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d0e02d3d27a0b4dcb13f954f537ca1dd8f282dcf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d4d40e437adb376be16b3a12dd5c63f0fa768247'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ed06675d3b8cd37120b447646d53f7cd3e6fcd63'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
epss: 0.00447
epssPercentile: 0.38667
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-15T21:44:59.238250Z'
ingestedAt: '2026-10-15T22:48:25.477Z'
---

## Overview

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

tipc: fix memory leak in tipc_link_xmit

In case the backlog transmit queue for system-importance messages is overloaded,
tipc_link_xmit() returns -ENOBUFS but the skb list is not purged. This leads to
memory leak and failure when a skb is allocated.

This commit fixes this issue by purging the skb list before tipc_link_xmit()
returns.

## Affected

- `linux_kernel >= 4.11, < 5.4.293`
- `linux_kernel >= 5.5, < 5.10.237`
- `linux_kernel >= 5.11, < 5.15.181`
- `linux_kernel >= 5.16, < 6.1.135`
- `linux_kernel >= 6.2, < 6.6.88`
- `linux_kernel >= 6.7, < 6.12.24`
- `linux_kernel >= 6.13, < 6.13.12`
- `linux_kernel >= 6.14, < 6.14.3`
- `linux_kernel = 6.15`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.14.3`