Integer overflow in Linux kernel - CVE-2026-89918
Published: September 17, 2026
Vulnerability identifier: #VU150375
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-2026-89918
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a failed TLB invalidation.
The vulnerability exists due to improper handling of address rollover in KVM arm64 virtual-address TLB invalidation when invalidating the last page or block in the TTBR1 virtual address space. A remote attacker can trigger a virtual-address TLB invalidation at the end of the address space to cause a failed TLB invalidation.
Affected software
Linux kernel
How to mitigate CVE-2026-89918
Install security update from vendor's repository.