SB2026011451 - NULL pointer dereference in Linux kernel hsr
Published: January 14, 2026
Security Bulletin ID
SB2026011451
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) NULL pointer dereference (CVE-ID: CVE-2025-68776)
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 website.
References
- 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