HighFix available
ippsample, pdfio — security advisory
PDFio before 1.6.5 contains a dangling pointer vulnerability in the dictionary string-formatting function that stores a pointer to a stack-local buffer in the document dictionary without copying the string value. In multi-threaded or pooled-request environments, attackers or concurrent users can trigger stack memory reuse across requests, causing cross-tenant document content corruption by silently overwriting one caller's dictionary string values with another caller's data.
- Products
- ippsample, pdfio
- Affected versions
- 0.0.0~git20220215.f365352-1, 0.0.0~git20220215.f365352-2, 0.0~git20210916.53e4740-1, 0.0~git20210916.53e4740-2, 0.0~git20211022.c75af30-1, 0.0~git20211022.c75af30-2, 0.0~git20220215.f365352-1, 0.0~git20220607.72f89b3-1, 1.5.1+dfsg-1, 1.6.1+dfsg-1, 1.6.1+dfsg-2, 1.6.1+dfsg-3, 1.6.2+dfsg-1, 1.6.3+dfsg-1, 1.6.3+dfsg-2
- Fixed versions
- 1.6.5+dfsg-1
- CVEs
- CVE-2026-77220
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 09:03 UTC · Revision 1
Source evidence
PDFio before 1.6.5 contains a dangling pointer vulnerability in the dictionary string-formatting function that stores a pointer to a stack-local buffer in the document dictionary without copying the string value. In multi-threaded or pooled-request environments, attackers or concurrent users can trigger stack memory reuse across requests, causing cross-tenant document content corruption by silently overwriting one caller's dictionary string values with another caller's data.
osv:DEBIAN-CVE-2026-77220
ippsample
Fixed versions: Not specified
ippsample
Fixed versions: Not specified
pdfio
Fixed versions: 1.6.5+dfsg-1
Complete source record
{
"id": "f1359baa7d71ed0c08be37e94b81689bd830b0e7bbdcd0d03d70e5fd9c97925a",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-77220",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-77220",
"summary": "PDFio before 1.6.5 contains a dangling pointer vulnerability in the dictionary string-formatting function that stores a pointer to a stack-local buffer in the document dictionary without copying the string value. In multi-threaded or pooled-request environments, attackers or concurrent users can trigger stack memory reuse across requests, causing cross-tenant document content corruption by silently overwriting one caller's dictionary string values with another caller's data.",
"evidence": "osv:DEBIAN-CVE-2026-77220",
"products": [
{
"name": {
"value": "ippsample",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.0.0~git20220215.f365352-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0.0~git20220215.f365352-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20220607.72f89b3-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "ippsample",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.0.0~git20220215.f365352-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.0.0~git20220215.f365352-2",
"evidence": "/affected/1/versions"
},
{
"value": "0.0~git20210916.53e4740-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.0~git20210916.53e4740-2",
"evidence": "/affected/1/versions"
},
{
"value": "0.0~git20211022.c75af30-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.0~git20211022.c75af30-2",
"evidence": "/affected/1/versions"
},
{
"value": "0.0~git20220215.f365352-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.0~git20220607.72f89b3-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "pdfio",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.6.5+dfsg-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.5.1+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.6.1+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.6.1+dfsg-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.6.1+dfsg-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.6.2+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.6.3+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.6.3+dfsg-2",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-77220",
"aliases": [
"DEBIAN-CVE-2026-77220"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ippsample",
"purl": "pkg:deb/debian/ippsample?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.0.0~git20220215.f365352-1",
"0.0.0~git20220215.f365352-2",
"0.0~git20220607.72f89b3-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77220.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ippsample",
"purl": "pkg:deb/debian/ippsample?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.0.0~git20220215.f365352-1",
"0.0.0~git20220215.f365352-2",
"0.0~git20210916.53e4740-1",
"0.0~git20210916.53e4740-2",
"0.0~git20211022.c75af30-1",
"0.0~git20211022.c75af30-2",
"0.0~git20220215.f365352-1",
"0.0~git20220607.72f89b3-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77220.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.5+dfsg-1"
}
]
}
],
"package": {
"name": "pdfio",
"purl": "pkg:deb/debian/pdfio?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.5.1+dfsg-1",
"1.6.1+dfsg-1",
"1.6.1+dfsg-2",
"1.6.1+dfsg-3",
"1.6.2+dfsg-1",
"1.6.3+dfsg-1",
"1.6.3+dfsg-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77220.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-13T09:47:30.385520325Z",
"provider": "osv",
"upstream": [
"CVE-2026-77220"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-77220"
]
},
"related_cves": [
{
"value": "CVE-2026-77220",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 307564,
"published_at": "2026-08-21T21:17:06.737+00:00"
}