SB20260928173 - Use-after-free in Linux kernel en tc driver
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928173
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-98016)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to access freed memory.
The vulnerability exists due to a use-after-free race in sample_restore_put() when concurrently tearing down TC sample rules sharing the same restore context. A local user can concurrently tear down shared TC sample rules to access freed memory.
Remediation
Install update from vendor's website.