CVE-2025-37885

Summary

In the Linux kernel, the following vulnerability has been resolved:

KVM: x86: Reset IRTE to host control if new route isn't postable

Restore an IRTE back to host control (remapped or posted MSI mode) if the new GSI route prevents posting the IRQ directly to a vCPU, regardless of the GSI routing type. Updating the IRTE if and only if the new GSI is an MSI results in KVM leaving an IRTE posting to a vCPU.

The dangling IRTE can result in interrupts being incorrectly delivered to the guest, and in the worst case scenario can result in use-after-free, e.g. if the VM is torn down, but the underlying host IRQ isn't freed.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxefc644048ecde54f016011fe10110addd0de348f < e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769affected
LinuxLinuxefc644048ecde54f016011fe10110addd0de348f < 116c7d35b8f72eac383b9fd371d7c1a8ffc2968baffected
LinuxLinuxefc644048ecde54f016011fe10110addd0de348f < 023816bd5fa46fab94d1e7917fe131b79ed1fb41affected
LinuxLinuxefc644048ecde54f016011fe10110addd0de348f < 3481fd96d801715942b6f69fe251133128156f30affected
LinuxLinuxefc644048ecde54f016011fe10110addd0de348f < b5de7ac74f69603ad803c524b840bffd36368fc3affected
LinuxLinuxefc644048ecde54f016011fe10110addd0de348f < 3066ec21d1a33896125747f68638725f456308dbaffected
LinuxLinuxefc644048ecde54f016011fe10110addd0de348f < 9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2affected
LinuxLinux4.4affected
LinuxLinux0 < 4.4unaffected
LinuxLinux5.10.237 <= 5.10.*unaffected
LinuxLinux5.15.181 <= 5.15.*unaffected
LinuxLinux6.1.136 <= 6.1.*unaffected
LinuxLinux6.6.89 <= 6.6.*unaffected
LinuxLinux6.12.26 <= 6.12.*unaffected
LinuxLinux6.14.5 <= 6.14.*unaffected
LinuxLinux6.15 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

References