NULL pointer dereference in Linux kernel - CVE-2026-90085
Published: September 19, 2026
Vulnerability identifier: #VU151406
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-2026-90085
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 rvu_dbg_nix_tm_tree_display() when reading the NIX TM tree debugfs path. A local user can read /sys/kernel/debug/octeontx2/nix/tm_tree for a NIX LF whose transmit queues are not set up to cause a denial of service.
The issue is triggered when the SQ context has not been initialized.
Affected software
Linux kernel
How to mitigate CVE-2026-90085
Install security update from vendor's repository.