SB20260919102 - NULL pointer dereference in Linux kernel xdp
Published: September 19, 2026
Security Bulletin ID
SB20260919102
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-2026-90115)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the __xsk_rcv() multi-buffer receive path when allocating buffers for a packet. A local user can supply fill queue entries that are rejected during buffer allocation to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/214fb79b0379cb0214905632a2537c0c33f594eb
- https://git.kernel.org/stable/c/60d7d3559ce66e227e195e9463cdfed8077c8659
- https://git.kernel.org/stable/c/8341bd3ff126d85bc8c4ed52eedcaa5b1a65f194
- https://git.kernel.org/stable/c/aaebce297efc3e3dccb98a6ff838cfaa47db08db
- https://git.kernel.org/stable/c/e37b2abca80473e106176e41712a369fd2f72117