High severity8.2NVD Advisory· Published Jul 25, 2026· Updated Oct 19, 2026
CVE-2026-64286
CVE-2026-64286
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.
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Affected products
17- osv-coords15 versionspkg:linux/kernelpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0
>= 6.2.0, < 6.6.145+ 14 more
- (no CPE)range: >= 6.2.0, < 6.6.145
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1.160000.2.22
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 7.1.7-1.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/477145860dba4c30f0b4e36f02f4c5291c1c888bnvdPatch
- git.kernel.org/stable/c/6bea2f8becdb20d34378493c3b77a9b9cf8c6cfanvdPatch
- git.kernel.org/stable/c/d4f4d61715d1061ba83b88196a3605662be30750nvdPatch
- git.kernel.org/stable/c/dfaef40d8a1533940fc1af788d70fce07362b4cenvdPatch
- git.kernel.org/stable/c/e8042f6e1d7befb2fb6b10a75918642bcd0acf9anvdPatch
News mentions
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