SB2025111335 - Integer underflow in Linux kernel ext4
Published: November 13, 2025
Security Bulletin ID
SB2025111335
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 security vulnerability.
1) Integer underflow (CVE-ID: CVE-2025-40190)
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to integer underflow within the ext4_xattr_inode_update_ref() function in fs/ext4/xattr.c. A local user can execute arbitrary code.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1cfb3e4ddbdc8e02e637b8852540bd4718bf4814
- https://git.kernel.org/stable/c/3d6269028246f4484bfed403c947a114bb583631
- https://git.kernel.org/stable/c/440b003f449a4ff2a00b08c8eab9ba5cd28f3943
- https://git.kernel.org/stable/c/505e69f76ac497e788f4ea0267826ec7266b40c8
- https://git.kernel.org/stable/c/57295e835408d8d425bef58da5253465db3d6888
- https://git.kernel.org/stable/c/6b879c4c6bbaab03c0ad2a983953bd1410bb165e
- https://git.kernel.org/stable/c/79ea7f3e11effe1bd9e753172981d9029133a278
- https://git.kernel.org/stable/c/ea39e712c2f5ae148ee5515798ae03523673e002