SB2025120896 - NULL pointer dereference in Linux kernel xdp
Published: December 8, 2025
Security Bulletin ID
SB2025120896
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-2025-40290)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the xsk_cq_reserve_locked(), xsk_cq_cancel_locked(), xsk_destruct_skb(), xsk_build_skb_zerocopy(), xsk_build_skb() and xsk_init() functions in net/xdp/xsk.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.