CVE-2025-21997: 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: xsk: fix an integer overflow in xp_create_and_assign_umem() Since the i and pool->chunk_size variables are of type 'u32', their product can wrap around and then be cast to 'u64'. This can lead to two different XDP buffers pointing to the same memory area. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.

Affected products

• Linux Linux Kernel: from 5.16, before 6.1.132 (fixed in 6.1.132); from 6.2, before 6.6.85 (fixed in 6.6.85); from 6.7, before 6.12.21 (fixed in 6.12.21); from 6.13, before 6.13.9 (fixed in 6.13.9); version 6.14 only

Published 2025-04-03. Last modified 2026-06-17.