CVE-2026-64286
Gravedad CVSS v3.1:
ALTA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
25/07/2026
Última modificación:
30/07/2026
Descripción
*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU<br />
<br />
flush_hyp_vcpu() copies the host vCPU context into the hyp&#39;s private<br />
vCPU on every run. ctxt_to_vcpu() expects a guest context to have a<br />
NULL __hyp_running_vcpu, which is only ever set on the host context, so<br />
that it resolves the vCPU via container_of(). While this is generally<br />
the case, flush_hyp_vcpu() copies the context verbatim and does not<br />
enforce this, so a value provided by the host is dereferenced at EL2<br />
(host -> EL2).<br />
<br />
Fix by clearing __hyp_running_vcpu after the copy.
Impacto
Puntuación base 3.x
8.20
Gravedad 3.x
ALTA
Referencias a soluciones, herramientas e información
- https://git.kernel.org/stable/c/477145860dba4c30f0b4e36f02f4c5291c1c888b
- https://git.kernel.org/stable/c/6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa
- https://git.kernel.org/stable/c/d4f4d61715d1061ba83b88196a3605662be30750
- https://git.kernel.org/stable/c/dfaef40d8a1533940fc1af788d70fce07362b4ce
- https://git.kernel.org/stable/c/e8042f6e1d7befb2fb6b10a75918642bcd0acf9a