High
Security advisory
In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-6778
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:31 UTC · Revision 1
Source evidence
In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow.
osv:CVE-2019-6778
Complete source record
{
"id": "bf9ddb9cff6bbb718b83bbc64b784c110db64e20c2fa6304dc5722b885413889",
"url": "https://osv.dev/vulnerability/CVE-2019-6778",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-6778",
"summary": "In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow.",
"evidence": "osv:CVE-2019-6778",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2019-6778",
"aliases": [
"CVE-2019-6778"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/qemu/qemu",
"type": "GIT",
"events": [
{
"introduced": "38441756b70eec5807b5f60dad11a93a91199866"
},
{
"last_affected": "38441756b70eec5807b5f60dad11a93a91199866"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:qemu:qemu:3.0.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.0.0"
},
{
"last_affected": "3.0.0"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"3.0.0",
"v3.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-6778.json"
}
},
{
"ranges": [
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"repo": "https://gitlab.com/qemu-project/qemu",
"type": "GIT",
"events": [
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},
{
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}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:qemu:qemu:3.0.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.0.0"
},
{
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}
],
"source": "CPE_STRING"
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}
],
"versions": [
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"v3.0.0"
],
"database_specific": {
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}
}
],
"modified": "2026-10-24T10:30:29.885784848Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJMTVGDLA654HNCDGLCUEIP36SNJEKK7/",
"https://seclists.org/bugtraq/2019/May/76",
"https://access.redhat.com/errata/RHSA-2019:1883",
"https://access.redhat.com/errata/RHSA-2019:1968",
"https://access.redhat.com/errata/RHSA-2019:2425",
"https://access.redhat.com/errata/RHSA-2019:2892",
"https://usn.ubuntu.com/3923-1/",
"https://www.debian.org/security/2019/dsa-4454",
"https://lists.gnu.org/archive/html/qemu-devel/2019-01/msg03132.html"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
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"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "14.04"
},
{
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},
{
"introduced": "16.04"
},
{
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},
{
"introduced": "18.04"
},
{
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},
{
"introduced": "18.10"
},
{
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}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
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"cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "29"
},
{
"last_affected": "29"
},
{
"introduced": "30"
},
{
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}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*",
"cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*"
],
"vendor_product": "opensuse:leap",
"extracted_events": [
{
"range": [
{
"introduced": "15.0"
},
{
"last_affected": "15.0"
},
{
"introduced": "42.3"
},
{
"last_affected": "42.3"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2019-6778",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 432442,
"published_at": "2019-03-21T16:01:10.203+00:00"
}