KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU
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.
CVE-2026-64286
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-64286
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "be66e67f175096f283c9d5614c4991fc9e7ed975",
"lessThan": "477145860dba4c30f0b4e36f02f4c5291c1c888b",
"versionType": "git"
},
{
"status": "affected",
"version": "be66e67f175096f283c9d5614c4991fc9e7ed975",
"lessThan": "dfaef40d8a1533940fc1af788d70fce07362b4ce",
"versionType": "git"
},
{
"status": "affected",
"version": "be66e67f175096f283c9d5614c4991fc9e7ed975",
"lessThan": "6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa",
"versionType": "git"
},
{
"status": "affected",
"version": "be66e67f175096f283c9d5614c4991fc9e7ed975",
"lessThan": "d4f4d61715d1061ba83b88196a3605662be30750",
"versionType": "git"
},
{
"status": "affected",
"version": "be66e67f175096f283c9d5614c4991fc9e7ed975",
"lessThan": "e8042f6e1d7befb2fb6b10a75918642bcd0acf9a",
"versionType": "git"
}
],
"programFiles": [
"arch/arm64/kvm/hyp/nvhe/hyp-main.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/arm64/kvm/hyp/nvhe/hyp-main.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64286
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40995 · Revision 1
- Added to Heist Feed
- Publisher date