SB20260928333 - Use-after-free in Linux kernel netfilter
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928333
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-97609)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to disclose sensitive information, modify data, or cause a denial of service.
The vulnerability exists due to a use-after-free in the nfnetlink_cttimeout timeout hook handling when a timeout policy lookup races with module unload. A local user can trigger a timeout policy lookup during module unload to disclose sensitive information, modify data, or cause a denial of service.
Remediation
Install update from vendor's website.