CVE-2022-50227
Description
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
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2022-50227
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2022-50227.html
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2023:2458
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 6.0.2-1 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.0.2-1 |
| debian | sid | fixed | 6.0.2-1 |
| debian | trixie | fixed | 6.0.2-1 |
References
Verify integrity in audit chain (admin only). AS-IS.