SB2025031252 - Use-after-free in Linux kernel s390 net driver
Published: March 12, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025031252
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) Use-after-free (CVE-ID: CVE-2025-21856)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ism_dev_release(), ism_probe(), device_del() and ism_remove() functions in drivers/s390/net/ism_drv.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0505ff2936f166405d81d0d454a81d9c14124344
- https://git.kernel.org/stable/c/915e34d5ad35a6a9e56113f852ade4a730fb88f0
- https://git.kernel.org/stable/c/940d15254d2216b585558bcf36312da50074e711
- https://git.kernel.org/stable/c/e26e8ac27351f457091459a0a355bacd06d5bb2b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.5