Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.2, < 6.6.145 |
References
- https://git.kernel.org/stable/c/477145860dba4c30f0b4e36f02f4c5291c1c888bPatch
- https://git.kernel.org/stable/c/6bea2f8becdb20d34378493c3b77a9b9cf8c6cfaPatch
- https://git.kernel.org/stable/c/d4f4d61715d1061ba83b88196a3605662be30750Patch
- https://git.kernel.org/stable/c/dfaef40d8a1533940fc1af788d70fce07362b4cePatch
- https://git.kernel.org/stable/c/e8042f6e1d7befb2fb6b10a75918642bcd0acf9aPatch
FAQ
What is CVE-2026-64286?
CVE-2026-64286 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 ...
How severe is CVE-2026-64286?
CVE-2026-64286 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64286?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.