Bug 2395672 (CVE-2023-53269) - CVE-2023-53269 kernel: block: ublk: make sure that block size is set correctly
Summary: CVE-2023-53269 kernel: block: ublk: make sure that block size is set correctly
Keywords:
Status: NEW
Alias: CVE-2023-53269
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: 2025-09-16 09:02 UTC by OSIDB Bzimport
Modified: 2025-09-16 13:59 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2025-09-16 09:02:31 UTC 
In the Linux kernel, the following vulnerability has been resolved:

block: ublk: make sure that block size is set correctly

block size is one very key setting for block layer, and bad block size
could panic kernel easily.

Make sure that block size is set correctly.

Meantime if ublk_validate_params() fails, clear ub->params so that disk
is prevented from being added.
Comment 1 Keith Grant 2025-09-16 13:58:05 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091603-CVE-2023-53269-4dc7@gregkh/T
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