CVE-2026-64286

CVE CVE-2026-64286EUVD EUVD-2026-48998Published 2026-07-25T08:49:27.000ZLast changed 2026-08-05T12:40:35.000ZCVSS 8.2

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU flush_hyp_vcpu() copies the host vCPU context into the hyp's private vCPU on every run. ctxt_to_vcpu() expects a guest context to have a NULL __hyp_running_vcpu, which is only ever set on the host context, so that it resolves the vCPU via container_of(). While this is generally the case, flush_hyp_vcpu() copies the context verbatim and does not enforce this, so a value provided by the host is dereferenced at EL2 (host -> EL2). Fix by clearing __hyp_running_vcpu after the copy.

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 be66e67f175096f283c9d5614c4991fc9e7ed975 <477145860dba4c30f0b4e36f02f4c5291c1c888b; patch: 6.6.145; 6.2; patch: 7.1.4; patch: 0; patch: 6.18.39; patch: 7.2-rc1; be66e67f175096f283c9d5614c4991fc9e7ed975 <dfaef40d8a1533940fc1af788d70fce07362b4ce; patch: 6.12.97; be66e67f175096f283c9d5614c4991fc9e7ed975 <d4f4d61715d1061ba83b88196a3605662be30750; be66e67f175096f283c9d5614c4991fc9e7ed975 <6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa; be66e67f175096f283c9d5614c4991fc9e7ed975 <e8042f6e1d7befb2fb6b10a75918642bcd0acf9a

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

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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