CVE-2026-98637
Received Received - Intake

KVM: arm64 VM-wide SVE Feature Preservation on vCPU Init Failure

Publication date: 2026-10-18

Last updated on: 2026-10-18

Assigner: kernel.org

Description
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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-18
Last Modified
2026-10-18
Generated
2026-10-18
EPSS Evaluated
N/A
NVD
CVE-2026-98637
EUVD
EUVD-2026-103551

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
Linux Linux 5db1bef933427aa467ad89c7b695a84a6b4afe16
Linux Linux 5db1bef933427aa467ad89c7b695a84a6b4afe16
Linux Linux 5db1bef933427aa467ad89c7b695a84a6b4afe16
Linux Linux 6.16

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
AI Quick Actions have not been generated yet.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-98637. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart