CVE-2026-98637
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 versions
Linux kernel versions
6.16
and later are affected. Fixed in
6.18.55,
7.2.9,
7.3
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-98637?
CVE-2026-98637 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.16 onward and has been patched in 6.18.55, 7.2.9 and 7.3. CVE-2026-98637 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-98637?
Yes. CVE-2026-98637 has been patched. Fixed versions include 6.18.55, 7.2.9 and 7.3. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-98637 actively exploited?
No. CVE-2026-98637 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.