PT-2026-43787 · Linux · Linux Kernel
CVE-2026-45920
·
Published
2026-05-27
·
Updated
2026-07-31
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
An issue exists in the ext4 file system where a double decrement of the dirty clusters counter occurs during file system shutdown. This happens in the error path between the
ext4 mb mark diskspace used() function and its caller ext4 mb new blocks(). Specifically, when a shutdown triggers an error return from ext4 handle dirty metadata() calls within ext4 mb mark context(), ext4 mb mark diskspace used() decrements the cluster counters and returns an error. Subsequently, ext4 mb new blocks() decrements the s dirtyclusters counter variable a second time, leading to an inconsistent value of -1 and triggering a warning in the ext4 put super() function.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Double Free
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Weakness Enumeration
Related Identifiers
Affected Products
Linux Kernel