CVE-2022-50227

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Source
https://cve.org/CVERecord?id=CVE-2022-50227
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50227.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-50227
Downstream
Published
2025-06-18T11:03:59.885Z
Modified
2026-03-11T09:54:45.806055Z
Summary
KVM: x86/xen: Initialize Xen timer only once
Details

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 kvmxeninittimer() is called on every KVMXENVCPUATTRTYPETIMER, 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: xentimercallbac0 RIP: 0010:debugprintobject+0x16e/0x250 lib/debugobjects.c:502 Call Trace: _debugobjectinit debughrtimerinit debuginit hrtimerinit kvmxeninittimer kvmxenvcpusetattr kvmarchvcpuioctl kvmvcpuioctl vfsioctl

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50227.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
536395260582be7443b0b35b0bbb89ffe3947f62
Fixed
9a9b5771e930f408c3419799000f76a9abaf2278
Fixed
af735db31285fa699384c649be72a9f32ecbb665

Affected versions

v5.*
v5.17
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
v5.19.1

Database specific

vanir_signatures 
[
    {
        "signature_type": "Function",
        "signature_version": "v1",
        "target": {
            "file": "arch/x86/kvm/xen.c",
            "function": "kvm_xen_vcpu_set_attr"
        },
        "id": "CVE-2022-50227-15682096",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@af735db31285fa699384c649be72a9f32ecbb665",
        "digest": {
            "function_hash": "334448388018895477923148161510218324449",
            "length": 5173.0
        }
    },
    {
        "signature_type": "Line",
        "signature_version": "v1",
        "target": {
            "file": "arch/x86/kvm/xen.c"
        },
        "id": "CVE-2022-50227-7d3e3dc1",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@af735db31285fa699384c649be72a9f32ecbb665",
        "digest": {
            "line_hashes": [
                "304832671344299983688768872278973424206",
                "329104595591519148452607042389380520998",
                "10722711034171336562387614460802435045",
                "301200193194119927726457539090771509991"
            ],
            "threshold": 0.9
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50227.json"