🛡️ CVE-2025-37909 — debian-linux

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-401 NVD

5.5

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

net: lan743x: Fix memleak issue when GSO enabled

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

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2025-37909 is classified as CWE-401: Memory Leak. Allocated memory is never released, so long-running or repeated operations gradually exhaust it.

Affected software

CVE-2025-37909 is recorded against 3 packages.

debian-linux
kernel (from 6.13.0 up to 6.14.6)
linux-kernel

Timeline and source

Published on 20 May 2025 and last revised on 14 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
lists.debian.org
lists.debian.org
cert-portal.siemens.com

CVE-2025-37909 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

BellSoft Debian Debian 11 (Root.io)Debian 12 (Root.io)Ubuntu 22.04 (Root.io)Ubuntu 24.04 (Root.io)Ubuntu

Details

Severity MEDIUM

CVSS Score 5.5

CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE CWE-401

Public Exploit ✅ No

Source NVD

Published 2025-05-20

Updated 2026-08-20

Modified 2026-07-14

Fix URL https://git.kernel.org/stable/c/093855ce90177488eac772de4eefbb909033ce5f

Affected Packages

Software	From version	Fixed in
debian-linux	—	—
kernel	6.13.0	6.14.6
linux-kernel	—	—

References

Patch https://git.kernel.org/stable/c/093855ce90177488eac772de4eefbb909033ce5f

Patch https://git.kernel.org/stable/c/189b05f189cac9fd233ef04d31cb5078c4d09c39

Patch https://git.kernel.org/stable/c/2d52e2e38b85c8b7bc00dca55c2499f46f8c8198

Patch https://git.kernel.org/stable/c/6c65ee5ad632eb8dcd3a91cf5dc99b22535f44d9

Patch https://git.kernel.org/stable/c/a0e0efbabbbe6a1859bc31bf65237ce91e124b9b

Patch https://git.kernel.org/stable/c/dae1ce27ceaea7e1522025b15252e3cc52802622

Patch https://git.kernel.org/stable/c/df993daa4c968b4b23078eacc248f6502ede8664

Patch https://git.kernel.org/stable/c/f42c18e2f14c1b1fdd2a5250069a84bc854c398c

Mailing List https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html

Mailing List https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html

https://cert-portal.siemens.com/productcert/html/ssa-019113.html

🔗 NVD 🔗 Mitre ✅ Fix / Advisory

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