CVE-2022-50227 — KVM: x86/xen: Initialize Xen timer only once
In the Linux kernel, the following vulnerability has been resolved: KVM: x86/xen: Initialize Xen timer only once Add a check for existing xen timers before initializing a new …
Published: 2025-06-18 · CVSS: 7.8 · CVSS 3.1
In the Linux kernel, the following vulnerability has been resolved: KVM: x86/xen: Initialize Xen timer only once Add a check for existing xen timers before initializing a new one. Currently kvm_xen_init_timer() is called on every KVM_XEN_VCPU_ATTR_TYPE_TIMER, which is causing the following ODEBUG crash when vcpu->arch.xen.timer is already set. ODEBUG: init active (active state 0) object type: hrtimer hint: xen_timer_callbac0 RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:502 Call Trace: __debug_object_init debug_hrtimer_init debug_init hrtimer_init kvm_xen_init_timer kvm_xen_vcpu_set_attr kvm_arch_vcpu_ioctl kvm_vcpu_ioctl vfs_ioctl
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7