CVE-2026-89916 Linux Kernel KVM arm64 - Race Condition

Linux kernel KVM arm64 contains a race condition in VNCR TLB invalidation caused by improper handling of concurrent page faults and TLB updates, letting attackers cause inconsistent memory translation, exploit requires concurrent vCPU execution.

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
Race Condition
Impact
Privilege Escalation, Denial Of Service
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 for VNCR invalidation handling.

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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