KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2 pkvm_init_features_from_host() takes KVM_ARCH_FLAG_GUEST_HAS_SVE and KVM_ARM_VCPU_SVE from the host separately, but pkvm_vcpu_init_sve() tests the bit while vcpu_has_sve() reads the flag. A host that sets the flag without the bit gets a vCPU with a NULL sve_state that the world switch loads the guest's SVE state from. Derive the flag from the bit, and drop the protected path's copy of the host's flag, which is dead code since protected VMs are not allowed SVE.
CVE-2026-98928
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-2026-98928
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": "41d6028e28bd474298ff10409c292ec46cf43a90",
"lessThan": "4efda204087145d40a84344edec7e9d3885ad3ab",
"versionType": "git"
},
{
"status": "affected",
"version": "41d6028e28bd474298ff10409c292ec46cf43a90",
"lessThan": "7b5e99d286747b6b5b583b8efcd06bdbdd94b229",
"versionType": "git"
},
{
"status": "affected",
"version": "41d6028e28bd474298ff10409c292ec46cf43a90",
"lessThan": "4f16c5fc8dc4c5596e3777ab9f449a54e3f85fd5",
"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": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"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-2026-98928
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #52788 · Revision 1
- Added to Heist Feed
- Publisher date