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.
Product status
efc644048ecde54f016011fe10110addd0de348f (git) before e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769
efc644048ecde54f016011fe10110addd0de348f (git) before 116c7d35b8f72eac383b9fd371d7c1a8ffc2968b
efc644048ecde54f016011fe10110addd0de348f (git) before 023816bd5fa46fab94d1e7917fe131b79ed1fb41
efc644048ecde54f016011fe10110addd0de348f (git) before 3481fd96d801715942b6f69fe251133128156f30
efc644048ecde54f016011fe10110addd0de348f (git) before b5de7ac74f69603ad803c524b840bffd36368fc3
efc644048ecde54f016011fe10110addd0de348f (git) before 3066ec21d1a33896125747f68638725f456308db
efc644048ecde54f016011fe10110addd0de348f (git) before 9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2
4.4
Any version before 4.4
5.10.237 (semver)
5.15.181 (semver)
6.1.136 (semver)
6.6.89 (semver)
6.12.26 (semver)
6.14.5 (semver)
6.15 (original_commit_for_fix)
References
git.kernel.org/...c/e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769
git.kernel.org/...c/116c7d35b8f72eac383b9fd371d7c1a8ffc2968b
git.kernel.org/...c/023816bd5fa46fab94d1e7917fe131b79ed1fb41
git.kernel.org/...c/3481fd96d801715942b6f69fe251133128156f30
git.kernel.org/...c/b5de7ac74f69603ad803c524b840bffd36368fc3
git.kernel.org/...c/3066ec21d1a33896125747f68638725f456308db
git.kernel.org/...c/9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2
