CVE-2026-89932 Linux Kernel KVM - Information Disclosure

Linux kernel KVM nVMX contains a vulnerability caused by not flushing vpid02 on first use, letting attackers cause stale TLB entries to be used, potentially leading to information leakage or VM isolation bypass, exploit requires nested VMX usage with VMXOFF -> VMXON sequence.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.16% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Information Disclosure
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/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 vpid02 flushing on first use.

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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