Race condition in Linux kernel - CVE-2026-89929
Published: September 17, 2026
Vulnerability identifier: #VU150352
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-2026-89929
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise confidentiality, integrity, and availability.
The vulnerability exists due to improper synchronization of TLB invalidation in KVM nested virtualization INVVPID emulation when a virtual machine is migrated between physical CPUs. A local user can cause L1 to migrate between physical CPUs while emulating INVVPID to compromise confidentiality, integrity, and availability.
Affected software
Linux kernel
How to mitigate CVE-2026-89929
Install security update from vendor's repository.