#VU121399 NULL pointer dereference in Linux kernel - CVE-2025-68776
Published: January 14, 2026
Vulnerability identifier: #VU121399
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-68776
CWE-ID: CWE-476
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 perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the prp_get_untagged_frame() function in net/hsr/hsr_forward.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/1742974c24a9c1f1fd2e5edca0cbaccb720b397a
- https://git.kernel.org/stable/c/188e0fa5a679570ea35474575e724d8211423d17
- https://git.kernel.org/stable/c/6220d38a08f8837575cd8f830928b49a3a5a5095
- https://git.kernel.org/stable/c/7be6d25f4d974e44918ba3a5d58ebb9d36879087
- https://git.kernel.org/stable/c/8f289fa12926aae44347ca7d490e216555d8f255