Critical
Security advisory
Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing files on a shared host directory. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2017-7471
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 06:02 UTC · Revision 1
Source evidence
Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing files on a shared host directory. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.
osv:CVE-2017-7471
Complete source record
{
"id": "8c7dcd280d6b5ba26e05992c82edb50b9b227e4b0947e0aa6a14a5f621a2a262",
"url": "https://osv.dev/vulnerability/CVE-2017-7471",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2017-7471",
"summary": "Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing files on a shared host directory. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.",
"evidence": "osv:CVE-2017-7471",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2017-7471",
"aliases": [
"CVE-2017-7471"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/qemu/qemu",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "d1b725ee12539906b72777fde1f6c73c2273d806"
},
{
"introduced": "d84f714eafedd8bb9d4aaec8b76417bef8e3535e"
},
{
"last_affected": "372b3fe0b2ecdd39ba850e31c0c6686315c507af"
}
],
"database_specific": {
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{
"cpe": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "2.8.1.1"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:qemu:qemu:2.9.0:rc0:*:*:*:*:*:*",
"range": [
{
"introduced": "2.9.0-rc0"
},
{
"last_affected": "2.9.0-rc0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:qemu:qemu:2.9.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "2.9.0-rc1"
},
{
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],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:qemu:qemu:2.9.0:rc2:*:*:*:*:*:*",
"range": [
{
"introduced": "2.9.0-rc2"
},
{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:qemu:qemu:2.9.0:rc3:*:*:*:*:*:*",
"range": [
{
"introduced": "2.9.0-rc3"
},
{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:qemu:qemu:2.9.0:rc4:*:*:*:*:*:*",
"range": [
{
"introduced": "2.9.0-rc4"
},
{
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"source": "CPE_STRING"
}
]
}
}
],
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"v1.0-rc3",
"v1.0-rc2",
"v1.0-rc1",
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"v0.14.0-rc0",
"v0.13.0-rc0",
"v0.12.0-rc0",
"v0.11.0-rc0",
"v0.5.0",
"v0.4.4",
"v0.4.3",
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"v0.4.1",
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],
"database_specific": {
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}
},
{
"ranges": [
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"type": "GIT",
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{
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"database_specific": {
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{
"cpe": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",
"range": [
{
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},
{
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}
],
"source": "CPE_RANGE"
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{
"cpe": "cpe:2.3:a:qemu:qemu:2.9.0:rc0:*:*:*:*:*:*",
"range": [
{
"introduced": "2.9.0-rc0"
},
{
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}
],
"source": "CPE_STRING"
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{
"cpe": "cpe:2.3:a:qemu:qemu:2.9.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "2.9.0-rc1"
},
{
"last_affected": "2.9.0-rc1"
}
],
"source": "CPE_STRING"
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{
"cpe": "cpe:2.3:a:qemu:qemu:2.9.0:rc2:*:*:*:*:*:*",
"range": [
{
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},
{
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}
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"source": "CPE_STRING"
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{
"cpe": "cpe:2.3:a:qemu:qemu:2.9.0:rc3:*:*:*:*:*:*",
"range": [
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{
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"source": "CPE_STRING"
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{
"cpe": "cpe:2.3:a:qemu:qemu:2.9.0:rc4:*:*:*:*:*:*",
"range": [
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{
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}
],
"versions": [
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"database_specific": {
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}
}
],
"modified": "2026-10-24T10:30:34.562838876Z",
"provider": "osv",
"references": [
"https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=9c6b899f7a46893ab3b671e341a2234e9c0c060e",
"https://security.gentoo.org/glsa/201706-03",
"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7471"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2017-7471",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 433546,
"published_at": "2018-07-09T14:29:00.21+00:00"
}