CVE-2026-98164 Linux Kernel KVM - Race Condition

Linux kernel KVM x86/mmu contains a logic flaw in write tracking across address spaces, caused by incomplete checks in kvm_gfn_is_write_tracked(), letting attackers potentially cause kernel crashes or memory corruption, exploit requires use of SMM and multiple address spaces.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.15% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Race Condition
Impact
Denial Of Service, Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-670

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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