CVE-2025-37909: debian linux — Fix

Description

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

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-401 CWE-401

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.17 — 5.4.294
linux	linux_kernel	5.5 — 5.10.238
linux	linux_kernel	5.11 — 5.15.182
linux	linux_kernel	5.16 — 6.1.138
linux	linux_kernel	6.2 — 6.6.90
linux	linux_kernel	6.7 — 6.12.28
linux	linux_kernel	6.13 — 6.14.6
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/093855ce90177488eac772de4eefbb909033ce5f https://git.kernel.org/stable/c/189b05f189cac9fd233ef04d31cb5078c4d09c39 https://git.kernel.org/stable/c/2d52e2e38b85c8b7bc00dca55c2499f46f8c8198 https://git.kernel.org/stable/c/6c65ee5ad632eb8dcd3a91cf5dc99b22535f44d9 https://git.kernel.org/stable/c/a0e0efbabbbe6a1859bc31bf65237ce91e124b9b https://git.kernel.org/stable/c/dae1ce27ceaea7e1522025b15252e3cc52802622 https://git.kernel.org/stable/c/df993daa4c968b4b23078eacc248f6502ede8664 https://git.kernel.org/stable/c/f42c18e2f14c1b1fdd2a5250069a84bc854c398c

Other References

https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html

Frequently Asked Questions

What is CVE-2025-37909? +

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 It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-37909? +

CVE-2025-37909 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-37909? +

CVE-2025-37909 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-37909? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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