vulnerability

Red Hat: CVE-2024-26601: kernel: ext4: regenerate buddy after block freeing failed if under fc replay (Multiple Advisories)

Name: Red Hat: CVE-2024-26601: kernel: ext4: regenerate buddy after block freeing failed if under fc replay (Multiple Advisories)
Creator: Red Hat
Published: 2024-02-26T00:00:00.000Z
Keywords: CVE, Red Hat, 2024, 26601, kernel, redhat-upgrade-kernel, redhat-upgrade-kernel-rt, Severity 5

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Severity

CVSS

(AV:L/AC:L/Au:S/C:N/I:N/A:C)

Published

Feb 26, 2024

Added

Sep 13, 2024

Modified

Jun 17, 2026

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.

Solutions

redhat-upgrade-kernelredhat-upgrade-kernel-rt

References

Rapid7 Labs

2026 Global Threat Landscape Report

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