NULL pointer dereference in Linux kernel - CVE-2026-90115
Published: September 19, 2026
Vulnerability identifier: #VU151370
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-90115
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-90115
Install security update from vendor's repository.
External 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