CVE-2024-26601: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: ext4: regenerate buddy after block freeing failed if under fc replay This mostly reverts commit 6bd97bf273bd ("ext4: remove redundant mb_regenerate_buddy()") and reintroduces mb_regenerate_buddy(). Based on code in mb_free_blocks(), fast commit replay can end up marking as free blocks that are already marked as such. This causes corruption of the buddy bitmap so we need to regenerate it in that case.

Affected products

• Linux Linux Kernel: before 5.10.211 (fixed in 5.10.211); from 5.11.0, before 5.15.150 (fixed in 5.15.150); from 5.16.0, before 6.1.78 (fixed in 6.1.78); from 6.2.0, before 6.6.17 (fixed in 6.6.17); from 6.7.0, before 6.7.5 (fixed in 6.7.5)

Published 2024-02-26. Last modified 2026-08-04.