KVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure pkvm_vcpu_init_sve() clears KVM_ARM_VCPU_SVE in kvm->arch.vcpu_features when it fails, but vcpu_has_sve() tests KVM_ARCH_FLAG_GUEST_HAS_SVE, which is left set. Later vCPUs on that VM then skip the SVE setup and register with a NULL sve_state, which the guest's first FP access hands to sve_load_state(). Return the error without touching vcpu_features.
CVE-2026-98637
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-2026-98637
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": "5db1bef933427aa467ad89c7b695a84a6b4afe16",
"lessThan": "bd46b41f412fb81c50bac1a0929ec31320f3a807",
"versionType": "git"
},
{
"status": "affected",
"version": "5db1bef933427aa467ad89c7b695a84a6b4afe16",
"lessThan": "f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcb",
"versionType": "git"
},
{
"status": "affected",
"version": "5db1bef933427aa467ad89c7b695a84a6b4afe16",
"lessThan": "a1b3c788ad31837e348075e93dbba3f447492776",
"versionType": "git"
}
],
"programFiles": [
"arch/arm64/kvm/hyp/nvhe/pkvm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/arm64/kvm/hyp/nvhe/pkvm.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98637
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38657 · Revision 1
- Added to Heist Feed
- Publisher date