CVE-2024-26601

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

State: Published
Severity: 7.8 High
Published: Feb 24, 2024
Updated: Aug 5, 2026
Reserved: Feb 19, 2024

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	0983142c5f17a62055ec851372273c3bc77e4788 to before 94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51aAffected 6bd97bf273bdb4944904e57480f6545bca48ad77 to before c1317822e2de80e78f137d3a2d99febab1b80326Affected 6bd97bf273bdb4944904e57480f6545bca48ad77 to before 78327acd4cdc4a1601af718b781eece577b6b7d4Affected 6bd97bf273bdb4944904e57480f6545bca48ad77 to before ea42d6cffb0dd27a417f410b9d0011e9859328cbAffected 6bd97bf273bdb4944904e57480f6545bca48ad77 to before 6b0d48647935e4b8c7b75d1eccb9043fcd4ee581Affected 6bd97bf273bdb4944904e57480f6545bca48ad77 to before c9b528c35795b711331ed36dc3dbee90d5812d4eAffected 5.10.181 to before 5.10.211Affected
LinuxLinux	5.11Affected before 5.11Not affected 5.10.211 through 5.10.Not affected 5.15.150 through 5.15.Not affected 6.1.78 through 6.1.Not affected 6.6.17 through 6.6.Not affected 6.7.5 through 6.7.*Not affected 6.8 and laterNot affected

Product

Versions

LinuxLinux

0983142c5f17a62055ec851372273c3bc77e4788 to before 94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51aAffected
6bd97bf273bdb4944904e57480f6545bca48ad77 to before c1317822e2de80e78f137d3a2d99febab1b80326Affected
6bd97bf273bdb4944904e57480f6545bca48ad77 to before 78327acd4cdc4a1601af718b781eece577b6b7d4Affected
6bd97bf273bdb4944904e57480f6545bca48ad77 to before ea42d6cffb0dd27a417f410b9d0011e9859328cbAffected
6bd97bf273bdb4944904e57480f6545bca48ad77 to before 6b0d48647935e4b8c7b75d1eccb9043fcd4ee581Affected
6bd97bf273bdb4944904e57480f6545bca48ad77 to before c9b528c35795b711331ed36dc3dbee90d5812d4eAffected
5.10.181 to before 5.10.211Affected

LinuxLinux

5.11Affected
before 5.11Not affected
5.10.211 through 5.10.*Not affected
5.15.150 through 5.15.*Not affected
6.1.78 through 6.1.*Not affected
6.6.17 through 6.6.*Not affected
6.7.5 through 6.7.*Not affected
6.8 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.