Critical
bochs — security advisory
Bochs 2.6-5 contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying an oversized input string to the application. Attackers can craft a malicious payload with 1200 bytes of padding followed by a return-oriented programming chain to overwrite the instruction pointer and execute shell commands with application privileges.
- Products
- bochs
- Affected versions
- 2.6-2build1, 2.6-5, 2.6-5build1, 2.6-5build2, 2.6.10+dfsg-2, 2.6.11+dfsg-1, 2.6.11+dfsg-1build1, 2.6.11+dfsg-4, 2.6.9+dfsg-3build1, 2.6.9+dfsg-4, 2.6.9+dfsg-5, 2.7+dfsg-2, 2.7+dfsg-4build1, 2.7+dfsg-4build4, 2.7+dfsg-4build5, 2.8+dfsg-1
- Fixed versions
- Not specified
- CVEs
- CVE-2018-25220
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:29 UTC · Revision 1
Source evidence
Bochs 2.6-5 contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying an oversized input string to the application. Attackers can craft a malicious payload with 1200 bytes of padding followed by a return-oriented programming chain to overwrite the instruction pointer and execute shell commands with application privileges.
osv:UBUNTU-CVE-2018-25220
bochs
Fixed versions: Not specified
bochs
Fixed versions: Not specified
bochs
Fixed versions: Not specified
bochs
Fixed versions: Not specified
bochs
Fixed versions: Not specified
bochs
Fixed versions: Not specified
bochs
Fixed versions: Not specified
bochs
Fixed versions: Not specified
Complete source record
{
"id": "685687365f8859e5e1f4cf4b79596ed5e238e0dfac33194c593210313c077c67",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2018-25220",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2018-25220",
"summary": "Bochs 2.6-5 contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying an oversized input string to the application. Attackers can craft a malicious payload with 1200 bytes of padding followed by a return-oriented programming chain to overwrite the instruction pointer and execute shell commands with application privileges.",
"evidence": "osv:UBUNTU-CVE-2018-25220",
"products": [
{
"name": {
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"evidence": "/affected/0/package/name"
},
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"affected_versions": [
{
"value": "2.6-2build1",
"evidence": "/affected/0/versions"
},
{
"value": "2.6-5",
"evidence": "/affected/0/versions"
},
{
"value": "2.6-5build1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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},
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"affected_versions": [
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{
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{
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"affected_versions": [
{
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{
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"evidence": "/affected/2/versions"
},
{
"value": "2.6.9+dfsg-5",
"evidence": "/affected/2/versions"
},
{
"value": "2.6.10+dfsg-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.6.11+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.6.11+dfsg-1build1",
"evidence": "/affected/2/versions"
}
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},
{
"name": {
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{
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{
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"evidence": "/affected/3/versions"
}
]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
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"affected_versions": [
{
"value": "2.7+dfsg-4build1",
"evidence": "/affected/4/versions"
},
{
"value": "2.7+dfsg-4build4",
"evidence": "/affected/4/versions"
},
{
"value": "2.7+dfsg-4build5",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "bochs",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.8+dfsg-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "bochs",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "2.8+dfsg-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
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"evidence": "/affected/7/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/7/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2018-25220",
"aliases": [
"UBUNTU-CVE-2018-25220"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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"events": [
{
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}
],
"package": {
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"purl": "pkg:deb/ubuntu/bochs?arch=source&distro=xenial",
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},
"versions": [
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"2.6-5",
"2.6-5build1"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bochs",
"binary_version": "2.6-5build1"
},
{
"binary_name": "bochs-sdl",
"binary_version": "2.6-5build1"
},
{
"binary_name": "bochs-term",
"binary_version": "2.6-5build1"
},
{
"binary_name": "bochs-wx",
"binary_version": "2.6-5build1"
},
{
"binary_name": "bochs-x",
"binary_version": "2.6-5build1"
},
{
"binary_name": "bochsbios",
"binary_version": "2.6-5build1"
},
{
"binary_name": "bximage",
"binary_version": "2.6-5build1"
},
{
"binary_name": "sb16ctrl-bochs",
"binary_version": "2.6-5build1"
}
]
}
},
{
"ranges": [
{
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"events": [
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}
]
}
],
"package": {
"name": "bochs",
"purl": "pkg:deb/ubuntu/bochs?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"2.6-5build1",
"2.6-5build2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-25220.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bochs",
"binary_version": "2.6-5build2"
},
{
"binary_name": "bochs-sdl",
"binary_version": "2.6-5build2"
},
{
"binary_name": "bochs-term",
"binary_version": "2.6-5build2"
},
{
"binary_name": "bochs-wx",
"binary_version": "2.6-5build2"
},
{
"binary_name": "bochs-x",
"binary_version": "2.6-5build2"
},
{
"binary_name": "bochsbios",
"binary_version": "2.6-5build2"
},
{
"binary_name": "bximage",
"binary_version": "2.6-5build2"
},
{
"binary_name": "sb16ctrl-bochs",
"binary_version": "2.6-5build2"
}
]
}
},
{
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{
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],
"package": {
"name": "bochs",
"purl": "pkg:deb/ubuntu/bochs?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"2.6.9+dfsg-3build1",
"2.6.9+dfsg-4",
"2.6.9+dfsg-5",
"2.6.10+dfsg-2",
"2.6.11+dfsg-1",
"2.6.11+dfsg-1build1"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
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"binary_version": "2.6.11+dfsg-1build1"
},
{
"binary_name": "bochs-sdl",
"binary_version": "2.6.11+dfsg-1build1"
},
{
"binary_name": "bochs-term",
"binary_version": "2.6.11+dfsg-1build1"
},
{
"binary_name": "bochs-wx",
"binary_version": "2.6.11+dfsg-1build1"
},
{
"binary_name": "bochs-x",
"binary_version": "2.6.11+dfsg-1build1"
},
{
"binary_name": "bochsbios",
"binary_version": "2.6.11+dfsg-1build1"
},
{
"binary_name": "bximage",
"binary_version": "2.6.11+dfsg-1build1"
},
{
"binary_name": "sb16ctrl-bochs",
"binary_version": "2.6.11+dfsg-1build1"
}
]
}
},
{
"ranges": [
{
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}
]
}
],
"package": {
"name": "bochs",
"purl": "pkg:deb/ubuntu/bochs?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.6.11+dfsg-4",
"2.7+dfsg-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-25220.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bochs",
"binary_version": "2.7+dfsg-2"
},
{
"binary_name": "bochs-sdl",
"binary_version": "2.7+dfsg-2"
},
{
"binary_name": "bochs-term",
"binary_version": "2.7+dfsg-2"
},
{
"binary_name": "bochs-wx",
"binary_version": "2.7+dfsg-2"
},
{
"binary_name": "bochs-x",
"binary_version": "2.7+dfsg-2"
},
{
"binary_name": "bochsbios",
"binary_version": "2.7+dfsg-2"
},
{
"binary_name": "bximage",
"binary_version": "2.7+dfsg-2"
},
{
"binary_name": "sb16ctrl-bochs",
"binary_version": "2.7+dfsg-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bochs",
"purl": "pkg:deb/ubuntu/bochs?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"2.7+dfsg-4build1",
"2.7+dfsg-4build4",
"2.7+dfsg-4build5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-25220.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bochs",
"binary_version": "2.7+dfsg-4build5"
},
{
"binary_name": "bochs-sdl",
"binary_version": "2.7+dfsg-4build5"
},
{
"binary_name": "bochs-term",
"binary_version": "2.7+dfsg-4build5"
},
{
"binary_name": "bochs-wx",
"binary_version": "2.7+dfsg-4build5"
},
{
"binary_name": "bochs-x",
"binary_version": "2.7+dfsg-4build5"
},
{
"binary_name": "bochsbios",
"binary_version": "2.7+dfsg-4build5"
},
{
"binary_name": "bximage",
"binary_version": "2.7+dfsg-4build5"
},
{
"binary_name": "sb16ctrl-bochs",
"binary_version": "2.7+dfsg-4build5"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bochs",
"purl": "pkg:deb/ubuntu/bochs?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"2.8+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-25220.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bochs",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-sdl",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-term",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-wx",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-x",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochsbios",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bximage",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "sb16ctrl-bochs",
"binary_version": "2.8+dfsg-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bochs",
"purl": "pkg:deb/ubuntu/bochs?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2.8+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-25220.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bochs",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-sdl",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-term",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-wx",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-x",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochsbios",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bximage",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "sb16ctrl-bochs",
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}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bochs",
"purl": "pkg:deb/ubuntu/bochs?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"2.8+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-25220.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bochs",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-sdl",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-term",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-wx",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochs-x",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bochsbios",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "bximage",
"binary_version": "2.8+dfsg-1"
},
{
"binary_name": "sb16ctrl-bochs",
"binary_version": "2.8+dfsg-1"
}
]
}
}
],
"modified": "2026-10-17T12:55:26.187320760Z",
"provider": "osv",
"upstream": [
"CVE-2018-25220"
],
"references": [
"https://ubuntu.com/security/CVE-2018-25220",
"https://www.cve.org/CVERecord?id=CVE-2018-25220",
"https://www.exploit-db.com/exploits/43979",
"https://www.vulncheck.com/advisories/bochs-5-buffer-overflow-remote-code-execution"
]
},
"related_cves": [
{
"value": "CVE-2018-25220",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 353755,
"published_at": "2026-03-28T12:16:00+00:00"
}