MediumFix available
libslirp, qemu and 1 more products — security advisory
tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.
- Products
- libslirp, qemu, slirp
- Affected versions
- Not specified
- Fixed versions
- 1:1.0.17-10, 1:4.1-2, 4.1.0-2
- CVEs
- CVE-2020-7039
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 13:37 UTC · Revision 1
Source evidence
tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.
osv:DEBIAN-CVE-2020-7039
libslirp
Fixed versions: 4.1.0-2
libslirp
Fixed versions: 4.1.0-2
libslirp
Fixed versions: 4.1.0-2
qemu
Fixed versions: 1:4.1-2
qemu
Fixed versions: 1:4.1-2
qemu
Fixed versions: 1:4.1-2
slirp
Fixed versions: 1:1.0.17-10
slirp
Fixed versions: 1:1.0.17-10
slirp
Fixed versions: 1:1.0.17-10
Complete source record
{
"id": "66825d29e9f0e970ca3c261c37992c47cd280761e15bd65abe13d1409dfc69c9",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-7039",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2020-7039",
"summary": "tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.",
"evidence": "osv:DEBIAN-CVE-2020-7039",
"products": [
{
"name": {
"value": "libslirp",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.1.0-2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/1/ranges"
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],
"affected_versions": []
},
{
"name": {
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},
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"evidence": "/affected/2/ranges"
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"affected_versions": []
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{
"name": {
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{
"name": {
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],
"affected_versions": []
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{
"name": {
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"affected_versions": []
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{
"name": {
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"evidence": "/affected/6/package/name"
},
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{
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"evidence": "/affected/6/ranges"
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"affected_versions": []
},
{
"name": {
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},
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"fixed_versions": [
{
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"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "slirp",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.0.17-10",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2020-7039",
"aliases": [
"DEBIAN-CVE-2020-7039"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
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{
"fixed": "4.1.0-2"
}
]
}
],
"package": {
"name": "libslirp",
"purl": "pkg:deb/debian/libslirp?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-7039.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
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"events": [
{
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{
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],
"package": {
"name": "libslirp",
"purl": "pkg:deb/debian/libslirp?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-7039.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
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{
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"package": {
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"database_specific": {
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},
"ecosystem_specific": {
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},
{
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"package": {
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},
"database_specific": {
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},
"ecosystem_specific": {
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}
},
{
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],
"package": {
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"purl": "pkg:deb/debian/qemu?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
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},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
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],
"package": {
"name": "qemu",
"purl": "pkg:deb/debian/qemu?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-7039.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
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"events": [
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],
"package": {
"name": "slirp",
"purl": "pkg:deb/debian/slirp?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-7039.json"
},
"ecosystem_specific": {
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}
},
{
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{
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],
"package": {
"name": "slirp",
"purl": "pkg:deb/debian/slirp?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-7039.json"
},
"ecosystem_specific": {
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}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
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],
"package": {
"name": "slirp",
"purl": "pkg:deb/debian/slirp?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-7039.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T12:02:33.584971086Z",
"provider": "osv",
"upstream": [
"CVE-2020-7039"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2020-7039"
]
},
"related_cves": [
{
"value": "CVE-2020-7039",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 452614,
"published_at": "2020-01-16T23:15:12.19+00:00"
}