CVE-2026-64172

CVE CVE-2026-64172EUVD EUVD-2026-45857Published 2026-07-19T15:40:57.000ZLast changed 2026-08-05T12:39:52.000ZCVSS 7.1

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235) Hygon Family 18h CPUs are derived from AMD Family 17h (Zen1) silicon and share the same erratum #1235: hardware may read a stale IsRunning=1 bit during ICR write emulation and silently fail to generate an AVIC_IPI_FAILURE_TARGET_NOT_RUNNING VM-Exit on the sending vCPU. The absence of the VM-Exit causes KVM to miss the required wakeup of blocking target vCPUs, leading to hung vCPUs and unbounded delays in guest execution. Extend the existing AMD Family 17h erratum #1235 workaround to also cover Hygon Family 18h. With IPI virtualization disabled, KVM never sets IsRunning=1 in the Physical ID table, so every non-self IPI generates a VM-Exit and is correctly emulated.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 8de4a1c8164e5b2e40d1df764840a31de983f40b <9560e6fee887a9594a89fa265b5b9c79b1591803; 8de4a1c8164e5b2e40d1df764840a31de983f40b <9a12fa5213cfc391e0eed63902d3be98f0913765; patch: 6.18.34; patch: 7.0.11; 6.17; 8de4a1c8164e5b2e40d1df764840a31de983f40b <94ade38f317ea086a181db0e6b69c574b3b70a5e; patch: 0; patch: 7.1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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