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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-98637

KVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 5db1bef933427aa467ad89c7b695a84a6b4afe16 to < bd46b41f412fb81c50bac1a0929ec31320f3a807affected
  • 5db1bef933427aa467ad89c7b695a84a6b4afe16 to < f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcbaffected
  • 5db1bef933427aa467ad89c7b695a84a6b4afe16 to < a1b3c788ad31837e348075e93dbba3f447492776affected

Linux Linux

Default version status: affected

  • 6.16affected
  • 0 to < 6.16unaffected
  • 6.18.55 to ≤ 6.18.*unaffected
  • 7.2.9 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References