Memory leak in Linux kernel - CVE-2026-89565
Published: September 12, 2026
Vulnerability identifier: #VU149239
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89565
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a resource leak in ipip_tunnel_rcv() when processing packets in collect_md mode after metadata_dst allocation fails. A local user can trigger packet processing under these conditions to cause a denial of service.
The issue can be triggered through an ipip or mplsip tunnel configured in collect_md mode.
Affected software
Linux kernel
How to mitigate CVE-2026-89565
Install security update from vendor's repository.