#VU105653 Use-after-free in Linux kernel - CVE-2025-21856
Published: March 12, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU105653
Vulnerability risk: Low
CVSSv4.0: 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
CVE-ID: CVE-2025-21856
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
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.
External links
- 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