CVE-2026-98637KVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 5db1bef933427aa467ad89c7b695a84a6b4afe16 before bd46b41f412fb81c50bac1a0929ec31320f3a807; from 5db1bef933427aa467ad89c7b695a84a6b4afe16 before f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcb; from 5db1bef933427aa467ad89c7b695a84a6b4afe16 before a1b3c788ad31837e348075e93dbba3f447492776 | CNA record |
References
- https://git.kernel.org/stable/c/bd46b41f412fb81c50bac1a0929ec31320f3a807
- https://git.kernel.org/stable/c/f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcb
- https://git.kernel.org/stable/c/a1b3c788ad31837e348075e93dbba3f447492776
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.