CVE-2023-53569: 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: ext2: Check block size validity during mount Check that log of block size stored in the superblock has sensible value. Otherwise the shift computing the block size can overflow leading to undefined behavior.

Affected products

• Linux Linux Kernel: from 2.6.12.1, before 4.14.316 (fixed in 4.14.316); from 4.15, before 4.19.284 (fixed in 4.19.284); from 4.20, before 5.4.244 (fixed in 5.4.244); from 5.5, before 5.10.181 (fixed in 5.10.181); from 5.11, before 5.15.113 (fixed in 5.15.113); from 5.16, before 6.1.30 (fixed in 6.1.30); …

Published 2025-10-04. Last modified 2026-06-17.