CVE-2026-98928
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.
Affected versions
Linux kernel versions
6.14
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-2026-98928?
CVE-2026-98928 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.14 onward and has been patched in 6.18.55, 7.2.9 and 7.3. CVE-2026-98928 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-2026-98928?
Yes. CVE-2026-98928 has been patched. Fixed versions include 6.18.55, 7.2.9 and 7.3. If you are running Linux kernel 6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-98928 actively exploited?
No. CVE-2026-98928 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.