Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.4, < 5.10.237 |
| Debian | Debian Linux | 11.0 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/023816bd5fa46fab94d1e7917fe131b79ed1fb41Patch
- https://git.kernel.org/stable/c/116c7d35b8f72eac383b9fd371d7c1a8ffc2968bPatch
- https://git.kernel.org/stable/c/3066ec21d1a33896125747f68638725f456308dbPatch
- https://git.kernel.org/stable/c/3481fd96d801715942b6f69fe251133128156f30Patch
- https://git.kernel.org/stable/c/9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2Patch
- https://git.kernel.org/stable/c/b5de7ac74f69603ad803c524b840bffd36368fc3Patch
- https://git.kernel.org/stable/c/e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769Patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2025-37885?
CVE-2025-37885 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 mo...
How severe is CVE-2025-37885?
CVE-2025-37885 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-37885?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.