SB20250509132 - Integer underflow in Linux kernel btrfs
Published: May 9, 2025 Updated: May 10, 2025
Security Bulletin ID
SB20250509132
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer underflow (CVE-ID: CVE-2025-37856)
CWE-ID: CWE-191 - Integer underflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to integer underflow within the btrfs_put_transaction() and btrfs_cleanup_pending_block_groups() functions in fs/btrfs/transaction.c, within the btrfs_finish_extent_commit() function in fs/btrfs/extent-tree.c. A local user can execute arbitrary code.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/185fd73e5ac06027c4be9a129e59193f6a3ef202
- https://git.kernel.org/stable/c/7511e29cf1355b2c47d0effb39e463119913e2f6
- https://git.kernel.org/stable/c/909e60fb469d4101c6b08cf6e622efb062bb24a1
- https://git.kernel.org/stable/c/bf089c4d1141b27332c092b1dcca5022c415a3b6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.24