SB20260919132 - Use-after-free in Linux kernel octeontx2 af driver
Published: September 19, 2026
Security Bulletin ID
SB20260919132
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-90079)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to use-after-free in the CN20K mailbox teardown logic when an AF-VF mailbox initialization failure occurs after AF-PF mailbox setup. A local privileged user can trigger an AF-VF mailbox initialization failure to cause a denial of service.
Remediation
Install update from vendor's website.