Bug 2400722 (CVE-2023-53450) - CVE-2023-53450 kernel: ext4: remove a BUG_ON in ext4_mb_release_group_pa()
Summary: CVE-2023-53450 kernel: ext4: remove a BUG_ON in ext4_mb_release_group_pa()
Keywords:
Status: NEW
Alias: CVE-2023-53450
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: 2025-10-01 12:03 UTC by OSIDB Bzimport
Modified: 2025-10-02 18:48 UTC (History)
0 users

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

Attachments (Terms of Use)

Description OSIDB Bzimport 2025-10-01 12:03:39 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext4: remove a BUG_ON in ext4_mb_release_group_pa()

If a malicious fuzzer overwrites the ext4 superblock while it is
mounted such that the s_first_data_block is set to a very large
number, the calculation of the block group can underflow, and trigger
a BUG_ON check.  Change this to be an ext4_warning so that we don't
crash the kernel.
Comment 1 Jon Moroney 2025-10-01 22:33:53 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100103-CVE-2023-53450-35c4@gregkh/T
Note You need to log in before you can comment on or make changes to this bug.