CVE-2025-68780

The CVE-2025-68780 entry concerns the Linux kernel scheduler (sched/deadline). A bug in the deadline runqueue cpudl_free_cpus mask could mark a CPU as online when its runqueue was offline, potentially leaving a deadline task to the powered‑down CPU after migration or unplugging from the default r...

SUSE CVE-2012-4535

Xen 3.4 through 4.2, and possibly earlier versions, allows local guest OS administrators to cause a denial of service Xen infinite loop and physical CPU consumption by setting a VCPU with an "inappropriate deadline."...

DEBIAN-CVE-2012-4535

Xen 3.4 through 4.2, and possibly earlier versions, allows local guest OS administrators to cause a denial of service Xen infinite loop and physical CPU consumption by setting a VCPU with an "inappropriate deadline."...

Timer overflow DoS vulnerability

ISSUE DESCRIPTION A guest which sets a VCPU with an inappropriate deadline can cause an infinite loop in Xen, blocking the affected physical CPU indefinitely. IMPACT A malicious guest administrator can trigger the bug. If the Xen watchdog is enabled, the whole system will crash. Otherwise the gue...