CVE-2024-26601high

ext4: regenerate buddy after block freeing failed if under fc replay

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 0.3%

exploitation probability

0.3%top 81% of all CVEs

observed exploitation

nono source reports it

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/6b0d48647935e4b8c7b75d1eccb9043fcd4ee581 https://git.kernel.org/stable/c/78327acd4cdc4a1601af718b781eece577b6b7d4 https://git.kernel.org/stable/c/94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51a https://git.kernel.org/stable/c/c1317822e2de80e78f137d3a2d99febab1b80326 https://git.kernel.org/stable/c/c9b528c35795b711331ed36dc3dbee90d5812d4e https://git.kernel.org/stable/c/ea42d6cffb0dd27a417f410b9d0011e9859328cb https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html