SB20260919138 - NULL pointer dereference in Linux kernel octeontx2 af driver
Published: September 19, 2026
Security Bulletin ID
SB20260919138
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-2026-90085)
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 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.
Remediation
Install update from vendor's website.