CVE-2025-21711: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: net/rose: prevent integer overflows in rose_setsockopt() In case of possible unpredictably large arguments passed to rose_setsockopt() and multiplied by extra values on top of that, integer overflows may occur. Do the safest minimum and fix these issues by checking the contents of 'opt' and returning -EINVAL if they are too large. Also, switch to unsigned int and remove useless check for negative 'opt' in ROSE_IDLE case.

Affected products

• Linux Linux Kernel: from 2.6.12, before 6.1.129 (fixed in 6.1.129); from 6.2, before 6.6.76 (fixed in 6.6.76); from 6.7, before 6.12.13 (fixed in 6.12.13); from 6.13, before 6.13.2 (fixed in 6.13.2)

Published 2025-02-27. Last modified 2026-06-17.