CVE-2026-89918 Linux Kernel KVM arm64 - Logic Error

Linux kernel KVM arm64 contains a logic error in TLB invalidation by VA caused by incorrect address range comparison that fails on address rollover, letting attackers cause failed TLB invalidation, exploit requires kernel-level access.

CVSS base score 9.3 /10
Critical
CISA KEV
Not listed
Public exploit
None known
EPSS
0.19% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Logic Error
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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