CVE-2024-26601

low-risk
Published 2024-02-26

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (13)

Patch https://git.kernel.org/stable/c/6b0d48647935e4b8c7b75d1eccb9043fcd4ee581
Patch https://git.kernel.org/stable/c/78327acd4cdc4a1601af718b781eece577b6b7d4
Patch https://git.kernel.org/stable/c/94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51a
Patch https://git.kernel.org/stable/c/c1317822e2de80e78f137d3a2d99febab1b80326
Patch https://git.kernel.org/stable/c/c9b528c35795b711331ed36dc3dbee90d5812d4e
Patch https://git.kernel.org/stable/c/ea42d6cffb0dd27a417f410b9d0011e9859328cb
Patch https://git.kernel.org/stable/c/6b0d48647935e4b8c7b75d1eccb9043fcd4ee581
Patch https://git.kernel.org/stable/c/78327acd4cdc4a1601af718b781eece577b6b7d4
Patch https://git.kernel.org/stable/c/94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51a
Patch https://git.kernel.org/stable/c/c1317822e2de80e78f137d3a2d99febab1b80326
Patch https://git.kernel.org/stable/c/c9b528c35795b711331ed36dc3dbee90d5812d4e
Patch https://git.kernel.org/stable/c/ea42d6cffb0dd27a417f410b9d0011e9859328cb
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal