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 ...

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

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.17%

6.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-401

Affected Software

Vendor	Product	Versions	Update
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	6.15	Rc1
Debian	Debian Linux	11.0	—

References

Timeline

Published: May 20, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

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

How severe is CVE-2025-37909?

CVE-2025-37909 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.

How do I fix CVE-2025-37909?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.