---
id: CVE-2025-37909
title: 'net: lan743x: Fix memleak issue when GSO enabled'
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: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 23f0703c125be490f70501b6b24ed5645775c56a <
    093855ce90177488eac772de4eefbb909033ce5f
  - >-
    Linux >= 23f0703c125be490f70501b6b24ed5645775c56a <
    6c65ee5ad632eb8dcd3a91cf5dc99b22535f44d9
  - >-
    Linux >= 23f0703c125be490f70501b6b24ed5645775c56a <
    df993daa4c968b4b23078eacc248f6502ede8664
  - >-
    Linux >= 23f0703c125be490f70501b6b24ed5645775c56a <
    a0e0efbabbbe6a1859bc31bf65237ce91e124b9b
  - >-
    Linux >= 23f0703c125be490f70501b6b24ed5645775c56a <
    dae1ce27ceaea7e1522025b15252e3cc52802622
  - >-
    Linux >= 23f0703c125be490f70501b6b24ed5645775c56a <
    189b05f189cac9fd233ef04d31cb5078c4d09c39
  - >-
    Linux >= 23f0703c125be490f70501b6b24ed5645775c56a <
    f42c18e2f14c1b1fdd2a5250069a84bc854c398c
  - >-
    Linux >= 23f0703c125be490f70501b6b24ed5645775c56a <
    2d52e2e38b85c8b7bc00dca55c2499f46f8c8198
  - Linux 4.17
published: '2025-05-20'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T08:41:29.115Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-37909'
references:
  - url: 'https://git.kernel.org/stable/c/093855ce90177488eac772de4eefbb909033ce5f'
  - url: 'https://git.kernel.org/stable/c/6c65ee5ad632eb8dcd3a91cf5dc99b22535f44d9'
  - url: 'https://git.kernel.org/stable/c/df993daa4c968b4b23078eacc248f6502ede8664'
  - url: 'https://git.kernel.org/stable/c/a0e0efbabbbe6a1859bc31bf65237ce91e124b9b'
  - url: 'https://git.kernel.org/stable/c/dae1ce27ceaea7e1522025b15252e3cc52802622'
  - url: 'https://git.kernel.org/stable/c/189b05f189cac9fd233ef04d31cb5078c4d09c39'
  - url: 'https://git.kernel.org/stable/c/f42c18e2f14c1b1fdd2a5250069a84bc854c398c'
  - url: 'https://git.kernel.org/stable/c/2d52e2e38b85c8b7bc00dca55c2499f46f8c8198'
tags:
  - cve.org
epss: 0.00221
epssPercentile: 0.11236
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 >= 23f0703c125be490f70501b6b24ed5645775c56a < 093855ce90177488eac772de4eefbb909033ce5f`
- `Linux >= 23f0703c125be490f70501b6b24ed5645775c56a < 6c65ee5ad632eb8dcd3a91cf5dc99b22535f44d9`
- `Linux >= 23f0703c125be490f70501b6b24ed5645775c56a < df993daa4c968b4b23078eacc248f6502ede8664`
- `Linux >= 23f0703c125be490f70501b6b24ed5645775c56a < a0e0efbabbbe6a1859bc31bf65237ce91e124b9b`
- `Linux >= 23f0703c125be490f70501b6b24ed5645775c56a < dae1ce27ceaea7e1522025b15252e3cc52802622`
- `Linux >= 23f0703c125be490f70501b6b24ed5645775c56a < 189b05f189cac9fd233ef04d31cb5078c4d09c39`
- `Linux >= 23f0703c125be490f70501b6b24ed5645775c56a < f42c18e2f14c1b1fdd2a5250069a84bc854c398c`
- `Linux >= 23f0703c125be490f70501b6b24ed5645775c56a < 2d52e2e38b85c8b7bc00dca55c2499f46f8c8198`
- `Linux 4.17`

## Remediation

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