CVE-2025-37885 - KVM Linux Kernel MSI Route Handling Use-After-Free Vulnerability

CVE-2025-37885 - KVM Linux Kernel MSI Route Handling Use-After-Free Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Fri, 05/09/2025 - 11:39
CVE ID : CVE-2025-37885
Published : May 9, 2025, 7:16 a.m. | 1 hour, 25 minutes ago
Description : 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.
Severity: 0.0 | NA
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