Bug 2401521 (CVE-2023-53569) - CVE-2023-53569 kernel: ext2: Check block size validity during mount
Summary: CVE-2023-53569 kernel: ext2: Check block size validity during mount
Keywords:
Status: NEW
Alias: CVE-2023-53569
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-10-04 16:05 UTC by OSIDB Bzimport
Modified: 2025-10-28 16:35 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2025-10-04 16:05:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext2: Check block size validity during mount

Check that log of block size stored in the superblock has sensible
value. Otherwise the shift computing the block size can overflow leading
to undefined behavior.
Comment 1 Alexander B 2025-10-06 14:07:40 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100452-CVE-2023-53569-181e@gregkh/T
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