Bug 2420351 (CVE-2023-53861) - CVE-2023-53861 kernel: ext4: correct grp validation in ext4_mb_good_group
Summary: CVE-2023-53861 kernel: ext4: correct grp validation in ext4_mb_good_group
Keywords:
Status: NEW
Alias: CVE-2023-53861
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: 2025-12-09 02:04 UTC by OSIDB Bzimport
Modified: 2025-12-12 09:48 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2025-12-09 02:04:55 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext4: correct grp validation in ext4_mb_good_group

Group corruption check will access memory of grp and will trigger kernel
crash if grp is NULL. So do NULL check before corruption check.
Comment 1 Alexander B 2025-12-09 18:14:43 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120905-CVE-2023-53861-22c6@gregkh/T
Note You need to log in before you can comment on or make changes to this bug.