SB2026062541 - NULL pointer dereference in Linux kernel bpf
Published: June 25, 2026
Security Bulletin ID
SB2026062541
CSH 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 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-53111)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 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
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in bpf_lwt_xmit_push_encap when executing BPF LWT_XMIT programs through bpf_prog_test_run_skb with an uninitialized skb destination reference. A local user can execute a crafted BPF program test run to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/5500913516e071dbe23e5a404c861dd2d82c9589
- https://git.kernel.org/stable/c/599905c3f10bb83e6e6881d5a7f5cea5df07dc23
- https://git.kernel.org/stable/c/5c8d1f91fc4898d79f29d79c1a6f7c2b3ee66fb0
- https://git.kernel.org/stable/c/94f95328b9070909b5b875c647b17a11d3d85567
- https://git.kernel.org/stable/c/972787479ee73006fddb5e59ab5c8e733810ff42
- https://git.kernel.org/stable/c/c7ad31fb948fdd4905263f4324160682c3fa7bc6