Threats tagged 'ghsa-vhrh-h65f-3j9h'

CVE-2026-89920 is a high-severity vulnerability in the Linux kernel's KVM s390 subsystem involving improper reinjection of CK machine checks. The flaw could cause memory corruption by forwarding host channel-subsystem damage machine checks to the guest, which is unnecessary since the guest channel subsystem is emulated in userspace. The fix prevents reinjection of these machine checks and masks out the CK bit in certain machine check information to avoid improper handling.