MediumFix available
xen — security advisory
x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
- Products
- xen
- Affected versions
- Not specified
- Fixed versions
- 4.14.5-r1, 4.15.2-r1, 4.16.1-r1, 4.16.1-r2
- CVEs
- CVE-2022-26362
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:11 UTC · Revision 1
Source evidence
x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
osv:ALPINE-CVE-2022-26362
xen
Fixed versions: 4.14.5-r1
xen
Fixed versions: 4.15.2-r1
xen
Fixed versions: 4.15.2-r1
xen
Fixed versions: 4.16.1-r1
xen
Fixed versions: 4.16.1-r2
xen
Fixed versions: 4.16.1-r2
xen
Fixed versions: 4.16.1-r2
xen
Fixed versions: 4.16.1-r2
xen
Fixed versions: 4.16.1-r2
xen
Fixed versions: 4.16.1-r2
xen
Fixed versions: 4.16.1-r2
xen
Fixed versions: 4.16.1-r2
Complete source record
{
"id": "e60586b4626af9e53b187232b8762a7d135be101ca97c051d1f240c60f34c73d",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2022-26362",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2022-26362",
"summary": "x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.",
"evidence": "osv:ALPINE-CVE-2022-26362",
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],
"severity": "medium",
"structured": {
"id": "ALPINE-CVE-2022-26362",
"aliases": [
"ALPINE-CVE-2022-26362"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
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},
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],
"modified": "2026-10-15T07:17:54.176953896Z",
"provider": "osv",
"upstream": [
"CVE-2022-26362"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2022-26362"
]
},
"related_cves": [
{
"value": "CVE-2022-26362",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 321762,
"published_at": "2022-06-09T17:15:08.957+00:00"
}