CVE-2026-63941 KVM: arm64: Correctly cap ZCR_EL2 provided by a guest hypervisor

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Correctly cap ZCREL2 provided by a guest hypervisor ZCREL2 can be updated by a VHE guest hypervisor either using ZCREL2 which traps or ZCREL1 which does not trap. KVM handles both in different way: - on ZCREL2 trap,...

PT-2026-61258

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM arm64 implementation regarding how the ZCR EL2 register is handled for VHE guest hypervisors. When a guest hypervisor updates ZCR EL2 via ZCR EL1, the value is...