Memory leak in Linux kernel - CVE-2026-89500
Published: September 12, 2026
Vulnerability identifier: #VU149300
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-89500
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 incorrect memory page order handling in the ring buffer cached reader page handling when discarding a cached reader page after a concurrent ring buffer resize. A local user can cause a cached reader page to be discarded after a concurrent ring buffer resize to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-89500
Install security update from vendor's repository.