CVE-2026-89914 Linux Kernel KVM arm64 - Memory Management Vulnerability

Linux kernel contains a sign extension omission vulnerability in KVM arm64 decode_range_tlbi helper for range-based TLBI invalidation, letting attackers cause potential memory management issues, exploit requires specific usage of S2 invalidation.

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

Details

Type
Memory Management Vulnerability
Impact
Denial Of Service, Privilege Escalation
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 decode_range_tlbi sign extension.

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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