CVE-2026-89907 Linux Kernel - Memory Corruption

Linux kernel contains a memory corruption vulnerability in LoongArch KVM due to lack of validation of MSI data before routing to EIOINTC, letting attackers with VM fd corrupt kernel memory, exploit requires VM fd access.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Memory Corruption
Impact
Privilege Escalation, Denial Of Service
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.

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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