NULL pointer dereference in Linux kernel - CVE-2026-90080
Published: September 19, 2026
Vulnerability identifier: #VU151401
CSH Severity: Low
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90080
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the OcteonTX2 PF driver's af_xdp_zc_qidx bitmap handling when switching devlink eswitch mode. A local privileged user can switch devlink eswitch mode to dereference a NULL bitmap and cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-90080
Install security update from vendor's repository.