SB2025120498 - Input validation error in Linux kernel s390 net driver
Published: December 4, 2025
Security Bulletin ID
SB2025120498
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2025-40253)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the mpc_rcvd_sweep_req() function in drivers/s390/net/ctcm_mpc.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2
- https://git.kernel.org/stable/c/3b177b2ded563df16f6d5920671ffcfe5915d472
- https://git.kernel.org/stable/c/7ff76f8dc6b550f8d16487bf3cebc278be720b5c
- https://git.kernel.org/stable/c/b9dbfb1b5699f9f1e4991f96741bdf9047147589
- https://git.kernel.org/stable/c/da02a1824884d6c84c5e5b5ac373b0c9e3288ec2