Race condition in Linux kernel - CVE-2026-89916
Published: September 17, 2026
Vulnerability identifier: #VU150373
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89916
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose information, modify data, or cause a denial of service.
The vulnerability exists due to a race condition in KVM arm64 VNCR TLB handling when concurrently translating VNCR and invalidating stage 1 page-table entries. A remote attacker can trigger concurrent VNCR translation and stage 1 page-table invalidation to disclose information, modify data, or cause a denial of service.
A stale VNCR TLB entry can be inserted after the corresponding page-table entry has been invalidated.
Affected software
Linux kernel
How to mitigate CVE-2026-89916
Install security update from vendor's repository.