Resource exhaustion in Linux kernel - CVE-2026-89759
Published: September 12, 2026
Vulnerability identifier: #VU149054
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-2026-89759
CWE-ID: CWE-400
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 improper resource management in the kmemleak task stack scanning routine when scanning task stacks on a host with very many threads. A local user can initiate a kmemleak scan that processes task stacks without rescheduling to cause a denial of service.
Task stack scanning must be enabled.
Affected software
Linux kernel
How to mitigate CVE-2026-89759
Install security update from vendor's repository.