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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
efc644048ecde54f016011fe10110addd0de348f to < e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769affectedefc644048ecde54f016011fe10110addd0de348f to < 116c7d35b8f72eac383b9fd371d7c1a8ffc2968baffectedefc644048ecde54f016011fe10110addd0de348f to < 023816bd5fa46fab94d1e7917fe131b79ed1fb41affectedefc644048ecde54f016011fe10110addd0de348f to < 3481fd96d801715942b6f69fe251133128156f30affectedefc644048ecde54f016011fe10110addd0de348f to < b5de7ac74f69603ad803c524b840bffd36368fc3affectedefc644048ecde54f016011fe10110addd0de348f to < 3066ec21d1a33896125747f68638725f456308dbaffectedefc644048ecde54f016011fe10110addd0de348f to < 9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2affected
Linux Linux
Default version status: affected
4.4affected0 to < 4.4unaffected5.10.237 to ≤ 5.10.*unaffected5.15.181 to ≤ 5.15.*unaffected6.1.136 to ≤ 6.1.*unaffected6.6.89 to ≤ 6.6.*unaffected6.12.26 to ≤ 6.12.*unaffected6.14.5 to ≤ 6.14.*unaffected6.15 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769 ↗
- https://git.kernel.org/stable/c/116c7d35b8f72eac383b9fd371d7c1a8ffc2968b ↗
- https://git.kernel.org/stable/c/023816bd5fa46fab94d1e7917fe131b79ed1fb41 ↗
- https://git.kernel.org/stable/c/3481fd96d801715942b6f69fe251133128156f30 ↗
- https://git.kernel.org/stable/c/b5de7ac74f69603ad803c524b840bffd36368fc3 ↗
- https://git.kernel.org/stable/c/3066ec21d1a33896125747f68638725f456308db ↗
- https://git.kernel.org/stable/c/9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2 ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html ↗