CVE-2026-89911 Linux Kernel KVM arm64 - Denial of Service

Linux kernel KVM arm64 contains a vulnerability caused by improper capping of TLB Invalidation by Range, letting guest attackers cause overflow by encoding large ranges, exploit requires running guest VM.

CVSS base score 7.9 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.16% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version with the fix for KVM arm64 TLB range capping.

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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