MediumFix available
xen — security advisory
An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.
- Products
- xen
- Affected versions
- Not specified
- Fixed versions
- 4.12.4-r0, 4.13.2-r0, 4.14.0-r2
- CVEs
- CVE-2020-27674
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:09 UTC · Revision 1
Source evidence
An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.
osv:ALPINE-CVE-2020-27674
xen
Fixed versions: 4.12.4-r0
xen
Fixed versions: 4.13.2-r0
xen
Fixed versions: 4.13.2-r0
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
xen
Fixed versions: 4.14.0-r2
Complete source record
{
"id": "29210eaf55802ff9bb781532f3fb3259f9482b71e81ddda07befa147b81963a6",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-27674",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2020-27674",
"summary": "An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.",
"evidence": "osv:ALPINE-CVE-2020-27674",
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],
"severity": "medium",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
}
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"affected": [
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"database_specific": {
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},
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{
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],
"modified": "2026-10-26T11:17:55.162210988Z",
"provider": "osv",
"upstream": [
"CVE-2020-27674"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2020-27674"
]
},
"related_cves": [
{
"value": "CVE-2020-27674",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450577,
"published_at": "2020-10-22T21:15:14.077+00:00"
}