CVE-2022-50227 (GCVE-0-2022-50227)
Vulnerability from cvelistv5
Published
2025-06-18 11:03
Modified
2025-06-18 11:03
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"arch/x86/kvm/xen.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "536395260582be7443b0b35b0bbb89ffe3947f62",
"versionType": "git"
},
{
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"status": "affected",
"version": "536395260582be7443b0b35b0bbb89ffe3947f62",
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{
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"programFiles": [
"arch/x86/kvm/xen.c"
],
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"vendor": "Linux",
"versions": [
{
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"version": "5.19"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"version": "5.19.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.19.2",
"versionStartIncluding": "5.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0",
"versionStartIncluding": "5.19",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86/xen: Initialize Xen timer only once\n\nAdd a check for existing xen timers before initializing a new one.\n\nCurrently kvm_xen_init_timer() is called on every\nKVM_XEN_VCPU_ATTR_TYPE_TIMER, which is causing the following ODEBUG\ncrash when vcpu-\u003earch.xen.timer is already set.\n\nODEBUG: init active (active state 0)\nobject type: hrtimer hint: xen_timer_callbac0\nRIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:502\nCall Trace:\n__debug_object_init\ndebug_hrtimer_init\ndebug_init\nhrtimer_init\nkvm_xen_init_timer\nkvm_xen_vcpu_set_attr\nkvm_arch_vcpu_ioctl\nkvm_vcpu_ioctl\nvfs_ioctl"
}
],
"providerMetadata": {
"dateUpdated": "2025-06-18T11:03:59.885Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/9a9b5771e930f408c3419799000f76a9abaf2278"
},
{
"url": "https://git.kernel.org/stable/c/af735db31285fa699384c649be72a9f32ecbb665"
}
],
"title": "KVM: x86/xen: Initialize Xen timer only once",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50227",
"datePublished": "2025-06-18T11:03:59.885Z",
"dateReserved": "2025-06-18T10:57:27.432Z",
"dateUpdated": "2025-06-18T11:03:59.885Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2022-50227\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:53.743\",\"lastModified\":\"2025-06-18T13:47:40.833\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nKVM: x86/xen: Initialize Xen timer only once\\n\\nAdd a check for existing xen timers before initializing a new one.\\n\\nCurrently kvm_xen_init_timer() is called on every\\nKVM_XEN_VCPU_ATTR_TYPE_TIMER, which is causing the following ODEBUG\\ncrash when vcpu-\u003earch.xen.timer is already set.\\n\\nODEBUG: init active (active state 0)\\nobject type: hrtimer hint: xen_timer_callbac0\\nRIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:502\\nCall Trace:\\n__debug_object_init\\ndebug_hrtimer_init\\ndebug_init\\nhrtimer_init\\nkvm_xen_init_timer\\nkvm_xen_vcpu_set_attr\\nkvm_arch_vcpu_ioctl\\nkvm_vcpu_ioctl\\nvfs_ioctl\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: x86/xen: Inicializar el temporizador Xen solo una vez. Se ha a\u00f1adido una comprobaci\u00f3n de los temporizadores Xen existentes antes de inicializar uno nuevo. Actualmente, se llama a kvm_xen_init_timer() en cada KVM_XEN_VCPU_ATTR_TYPE_TIMER, lo que provoca el siguiente fallo de ODEBUG cuando vcpu-\u0026gt;arch.xen.timer ya est\u00e1 configurado. ODEBUG: init activo (estado activo 0) tipo de objeto: hrtimer sugerencia: xen_timer_callbac0 RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:502 Seguimiento de llamadas: __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\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/9a9b5771e930f408c3419799000f76a9abaf2278\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/af735db31285fa699384c649be72a9f32ecbb665\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}