CVE-2025-21671: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: zram: fix potential UAF of zram table If zram_meta_alloc failed early, it frees allocated zram->table without setting it NULL. Which will potentially cause zram_meta_free to access the table if user reset an failed and uninitialized device.

Affected products

• Linux Linux Kernel: from 6.1.122, before 6.1.127 (fixed in 6.1.127); from 6.6.68, before 6.6.74 (fixed in 6.6.74); from 6.12.7, before 6.12.11 (fixed in 6.12.11)

Published 2025-01-31. Last modified 2026-06-17.