SB20261023114 - Use-after-free in Linux kernel tipc
Published: October 23, 2026
Security Bulletin ID
SB20261023114
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) Use-after-free (CVE-ID: CVE-2026-99053)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 through kernel memory corruption.
The vulnerability exists due to use-after-free in the Linux kernel TIPC link-management handlers when processing requests concurrently with timer-driven cleanup of a down peer. A local user can issue link-management requests through generic netlink to trigger access to a freed node and potentially crash the kernel.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1428c5f1d346a2e1ac9156713975a72246957009
- https://git.kernel.org/stable/c/17e73bae400f6a434dc006e3bee92c94cf781954
- https://git.kernel.org/stable/c/3c3b308ee6e25729a6cf09b69cdd0e093220d40b
- https://git.kernel.org/stable/c/b60259d4047fbb735476c729dcf9306a038b6110
- https://git.kernel.org/stable/c/f17e70206a1e763fcca2578a8db3c4eed0f843a9