Double free in Linux kernel - CVE-2026-92489
Published: September 18, 2026
Vulnerability identifier: #VU151022
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92489
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a double-free.
The vulnerability exists due to a double free in xfrm_dev_direct_output() when handling packets dropped by netfilter. A local user can send a packet that is dropped by netfilter to trigger a double-free.
Affected software
Linux kernel
How to mitigate CVE-2026-92489
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/02deb637e965950148752a304dd1471212dd6470
- https://git.kernel.org/stable/c/2aed51fc58d9ce450e2c116efb956160fd06fa02
- https://git.kernel.org/stable/c/56a347950e661c1a7f8f31c43a2ea53c2323b6f4
- https://git.kernel.org/stable/c/621871b696b108026bf4b44ed4085ffa2102f417
- https://git.kernel.org/stable/c/bc9297796bfdcc8d9609236e54519a4f38737aac