HighFix available
xen — security advisory
insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.
- Products
- xen
- Affected versions
- Not specified
- Fixed versions
- 4.14.5-r5, 4.15.3-r2, 4.16.1-r6
- CVEs
- CVE-2022-33745
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:13 UTC · Revision 1
Source evidence
insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.
osv:ALPINE-CVE-2022-33745
xen
Fixed versions: 4.14.5-r5
xen
Fixed versions: 4.15.3-r2
xen
Fixed versions: 4.15.3-r2
xen
Fixed versions: 4.16.1-r6
xen
Fixed versions: 4.16.1-r6
xen
Fixed versions: 4.16.1-r6
xen
Fixed versions: 4.16.1-r6
xen
Fixed versions: 4.16.1-r6
xen
Fixed versions: 4.16.1-r6
xen
Fixed versions: 4.16.1-r6
xen
Fixed versions: 4.16.1-r6
Complete source record
{
"id": "2fc6d86a242de7d870ed8aeeb0aebcd6a8d4d64069f75c41fb2e34af5bf2a81e",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2022-33745",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2022-33745",
"summary": "insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.",
"evidence": "osv:ALPINE-CVE-2022-33745",
"products": [
{
"name": {
"value": "xen",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
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"value": "4.14.5-r5",
"evidence": "/affected/0/ranges"
}
],
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},
{
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"evidence": "/affected/1/package/name"
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"fixed_versions": [
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"evidence": "/affected/1/ranges"
}
],
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{
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{
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],
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},
{
"name": {
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},
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"evidence": "/affected/4/ranges"
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],
"affected_versions": []
},
{
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"affected_versions": []
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{
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"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/7/package/name"
},
"prerequisites": [],
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{
"value": "4.16.1-r6",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "xen",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.16.1-r6",
"evidence": "/affected/8/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/9/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.16.1-r6",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "ALPINE-CVE-2022-33745",
"aliases": [
"ALPINE-CVE-2022-33745"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.14.5-r5"
}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.13"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-33745.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.15.3-r2"
}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.14"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-33745.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
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"events": [
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},
{
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}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.15"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-33745.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
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"events": [
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},
{
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],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.17"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-33745.json"
},
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},
{
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],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.18"
},
"database_specific": {
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{
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],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.19"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-33745.json"
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{
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],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.20"
},
"database_specific": {
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},
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{
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],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-33745.json"
},
"ecosystem_specific": {}
},
{
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{
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}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-33745.json"
},
"ecosystem_specific": {}
},
{
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}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-33745.json"
},
"ecosystem_specific": {}
},
{
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],
"package": {
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"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-33745.json"
},
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}
],
"modified": "2026-10-15T07:17:54.227031769Z",
"provider": "osv",
"upstream": [
"CVE-2022-33745"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2022-33745"
]
},
"related_cves": [
{
"value": "CVE-2022-33745",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 321907,
"published_at": "2022-07-26T13:15:10.003+00:00"
}