---
id: CVE-2025-37909
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: lan743x: Fix memleak issue when GSO enabled

  Always map the `skb` to the LS descriptor
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: lan743x: Fix memleak issue when GSO enabled

  Always map the `skb` to the LS descriptor. Previously skb was
  mapped to EXT descriptor when the number of fragments is…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-401
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.17, < 5.4.294'
  - 'linux_kernel >= 5.5, < 5.10.238'
  - 'linux_kernel >= 5.11, < 5.15.182'
  - 'linux_kernel >= 5.16, < 6.1.138'
  - 'linux_kernel >= 6.2, < 6.6.90'
  - 'linux_kernel >= 6.7, < 6.12.28'
  - 'linux_kernel >= 6.13, < 6.14.6'
  - linux_kernel = 6.15
  - debian_linux = 11.0
patched:
  - linux_kernel 6.14.6
published: '2025-05-20'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:17:48.983'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-37909'
references:
  - url: 'https://git.kernel.org/stable/c/093855ce90177488eac772de4eefbb909033ce5f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/189b05f189cac9fd233ef04d31cb5078c4d09c39'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2d52e2e38b85c8b7bc00dca55c2499f46f8c8198'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6c65ee5ad632eb8dcd3a91cf5dc99b22535f44d9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a0e0efbabbbe6a1859bc31bf65237ce91e124b9b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dae1ce27ceaea7e1522025b15252e3cc52802622'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/df993daa4c968b4b23078eacc248f6502ede8664'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f42c18e2f14c1b1fdd2a5250069a84bc854c398c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-019113.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-457936.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.0023
epssPercentile: 0.13809
ingestedAt: '2026-09-08T15:33:26.997Z'
---

## Overview

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

net: lan743x: Fix memleak issue when GSO enabled

Always map the `skb` to the LS descriptor. Previously skb was
mapped to EXT descriptor when the number of fragments is zero with
GSO enabled. Mapping the skb to EXT descriptor prevents it from
being freed, leading to a memory leak

## Affected

- `linux_kernel >= 4.17, < 5.4.294`
- `linux_kernel >= 5.5, < 5.10.238`
- `linux_kernel >= 5.11, < 5.15.182`
- `linux_kernel >= 5.16, < 6.1.138`
- `linux_kernel >= 6.2, < 6.6.90`
- `linux_kernel >= 6.7, < 6.12.28`
- `linux_kernel >= 6.13, < 6.14.6`
- `linux_kernel = 6.15`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.14.6`