UnratedFix available
libpng1.6 — security advisory
[Use-after-free of zlib input in `png_read_end` after incomplete zTXt, iTXt or iCCP decompression]
- Products
- libpng1.6
- Affected versions
- 1.6.20-2, 1.6.20-2ubuntu0.1~esm1, 1.6.20-2ubuntu0.1~esm2, 1.6.20-2ubuntu0.1~esm3, 1.6.20-2ubuntu0.1~esm4, 1.6.34-1, 1.6.34-1ubuntu0.18.04.1, 1.6.34-1ubuntu0.18.04.2, 1.6.34-1ubuntu0.18.04.2+esm1, 1.6.34-1ubuntu0.18.04.2+esm2, 1.6.34-1ubuntu0.18.04.2+esm3, 1.6.37-1, 1.6.37-2, 1.6.37-2ubuntu0.1~esm1, 1.6.37-2ubuntu0.1~esm2, 1.6.37-2ubuntu0.1~esm3, 1.6.37-3build4, 1.6.37-3build5, 1.6.37-3ubuntu0.1, 1.6.37-3ubuntu0.3, 1.6.37-3ubuntu0.4, 1.6.37-3ubuntu0.5, 1.6.37-3ubuntu0.6, 1.6.40-1, 1.6.40-2, 1.6.40-3, 1.6.42-1, 1.6.43-1, 1.6.43-3, 1.6.43-5build1, 1.6.43-5ubuntu0.1, 1.6.43-5ubuntu0.3, 1.6.43-5ubuntu0.4, 1.6.43-5ubuntu0.5, 1.6.43-5ubuntu0.6, 1.6.50-1, 1.6.51-1, 1.6.53-1, 1.6.54-1, 1.6.55-1, 1.6.56-1, 1.6.57-1
- Fixed versions
- 1.6.20-2ubuntu0.1~esm5, 1.6.34-1ubuntu0.18.04.2+esm4, 1.6.37-2ubuntu0.1~esm4, 1.6.37-3ubuntu0.7, 1.6.43-5ubuntu0.7, 1.6.57-1ubuntu0.1
- CVEs
- CVE-2026-46675
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 10:04 UTC · Revision 1
Source evidence
[Use-after-free of zlib input in `png_read_end` after incomplete zTXt, iTXt or iCCP decompression]
osv:UBUNTU-CVE-2026-46675
libpng1.6
Fixed versions: 1.6.20-2ubuntu0.1~esm5
libpng1.6
Fixed versions: 1.6.34-1ubuntu0.18.04.2+esm4
libpng1.6
Fixed versions: 1.6.37-2ubuntu0.1~esm4
libpng1.6
Fixed versions: 1.6.37-3ubuntu0.7
libpng1.6
Fixed versions: 1.6.43-5ubuntu0.7
libpng1.6
Fixed versions: 1.6.57-1ubuntu0.1
Complete source record
{
"id": "e46b72f8527580d6d22e4805ff657ce2a6089ce43cbe149ca89eb3b58bf12e25",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-46675",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-46675",
"summary": "[Use-after-free of zlib input in `png_read_end` after incomplete zTXt, iTXt or iCCP decompression]",
"evidence": "osv:UBUNTU-CVE-2026-46675",
"products": [
{
"name": {
"value": "libpng1.6",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.6.20-2ubuntu0.1~esm5",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "1.6.20-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.20-2ubuntu0.1~esm1",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.20-2ubuntu0.1~esm2",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.20-2ubuntu0.1~esm3",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.20-2ubuntu0.1~esm4",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libpng1.6",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.6.34-1ubuntu0.18.04.2+esm4",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "1.6.34-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.34-1ubuntu0.18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.34-1ubuntu0.18.04.2",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.34-1ubuntu0.18.04.2+esm1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.34-1ubuntu0.18.04.2+esm2",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.34-1ubuntu0.18.04.2+esm3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libpng1.6",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.6.37-2ubuntu0.1~esm4",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.6.37-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.6.37-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.6.37-2ubuntu0.1~esm1",
"evidence": "/affected/2/versions"
},
{
"value": "1.6.37-2ubuntu0.1~esm2",
"evidence": "/affected/2/versions"
},
{
"value": "1.6.37-2ubuntu0.1~esm3",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "libpng1.6",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.6.37-3ubuntu0.7",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": [
{
"value": "1.6.37-3build4",
"evidence": "/affected/3/versions"
},
{
"value": "1.6.37-3build5",
"evidence": "/affected/3/versions"
},
{
"value": "1.6.37-3ubuntu0.1",
"evidence": "/affected/3/versions"
},
{
"value": "1.6.37-3ubuntu0.3",
"evidence": "/affected/3/versions"
},
{
"value": "1.6.37-3ubuntu0.4",
"evidence": "/affected/3/versions"
},
{
"value": "1.6.37-3ubuntu0.5",
"evidence": "/affected/3/versions"
},
{
"value": "1.6.37-3ubuntu0.6",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "libpng1.6",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.6.43-5ubuntu0.7",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": [
{
"value": "1.6.40-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.40-2",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.40-3",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.42-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.43-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.43-3",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.43-5build1",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.43-5ubuntu0.1",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.43-5ubuntu0.3",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.43-5ubuntu0.4",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.43-5ubuntu0.5",
"evidence": "/affected/4/versions"
},
{
"value": "1.6.43-5ubuntu0.6",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "libpng1.6",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.6.57-1ubuntu0.1",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": [
{
"value": "1.6.50-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.6.51-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.6.53-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.6.54-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.6.55-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.6.56-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.6.57-1",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "unknown",
"structured": {
"id": "UBUNTU-CVE-2026-46675",
"aliases": [
"UBUNTU-CVE-2026-46675"
],
"metrics": [
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.20-2ubuntu0.1~esm5"
}
]
}
],
"package": {
"name": "libpng1.6",
"purl": "pkg:deb/ubuntu/libpng1.6?arch=source&distro=esm-apps-legacy%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1.6.20-2",
"1.6.20-2ubuntu0.1~esm1",
"1.6.20-2ubuntu0.1~esm2",
"1.6.20-2ubuntu0.1~esm3",
"1.6.20-2ubuntu0.1~esm4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46675.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libpng16-16",
"binary_version": "1.6.20-2ubuntu0.1~esm5"
},
{
"binary_name": "libpng16-devtools",
"binary_version": "1.6.20-2ubuntu0.1~esm5"
},
{
"binary_name": "libpng16-tools",
"binary_version": "1.6.20-2ubuntu0.1~esm5"
}
],
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.34-1ubuntu0.18.04.2+esm4"
}
]
}
],
"package": {
"name": "libpng1.6",
"purl": "pkg:deb/ubuntu/libpng1.6?arch=source&distro=esm-infra%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"1.6.34-1",
"1.6.34-1ubuntu0.18.04.1",
"1.6.34-1ubuntu0.18.04.2",
"1.6.34-1ubuntu0.18.04.2+esm1",
"1.6.34-1ubuntu0.18.04.2+esm2",
"1.6.34-1ubuntu0.18.04.2+esm3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46675.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libpng-tools",
"binary_version": "1.6.34-1ubuntu0.18.04.2+esm4"
},
{
"binary_name": "libpng16-16",
"binary_version": "1.6.34-1ubuntu0.18.04.2+esm4"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.37-2ubuntu0.1~esm4"
}
]
}
],
"package": {
"name": "libpng1.6",
"purl": "pkg:deb/ubuntu/libpng1.6?arch=source&distro=esm-infra%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"1.6.37-1",
"1.6.37-2",
"1.6.37-2ubuntu0.1~esm1",
"1.6.37-2ubuntu0.1~esm2",
"1.6.37-2ubuntu0.1~esm3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46675.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libpng-tools",
"binary_version": "1.6.37-2ubuntu0.1~esm4"
},
{
"binary_name": "libpng16-16",
"binary_version": "1.6.37-2ubuntu0.1~esm4"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.37-3ubuntu0.7"
}
]
}
],
"package": {
"name": "libpng1.6",
"purl": "pkg:deb/ubuntu/libpng1.6?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.6.37-3build4",
"1.6.37-3build5",
"1.6.37-3ubuntu0.1",
"1.6.37-3ubuntu0.3",
"1.6.37-3ubuntu0.4",
"1.6.37-3ubuntu0.5",
"1.6.37-3ubuntu0.6"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46675.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libpng-tools",
"binary_version": "1.6.37-3ubuntu0.7"
},
{
"binary_name": "libpng16-16",
"binary_version": "1.6.37-3ubuntu0.7"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.43-5ubuntu0.7"
}
]
}
],
"package": {
"name": "libpng1.6",
"purl": "pkg:deb/ubuntu/libpng1.6?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.6.40-1",
"1.6.40-2",
"1.6.40-3",
"1.6.42-1",
"1.6.43-1",
"1.6.43-3",
"1.6.43-5build1",
"1.6.43-5ubuntu0.1",
"1.6.43-5ubuntu0.3",
"1.6.43-5ubuntu0.4",
"1.6.43-5ubuntu0.5",
"1.6.43-5ubuntu0.6"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46675.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libpng-tools",
"binary_version": "1.6.43-5ubuntu0.7"
},
{
"binary_name": "libpng16-16t64",
"binary_version": "1.6.43-5ubuntu0.7"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.57-1ubuntu0.1"
}
]
}
],
"package": {
"name": "libpng1.6",
"purl": "pkg:deb/ubuntu/libpng1.6?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.6.50-1",
"1.6.51-1",
"1.6.53-1",
"1.6.54-1",
"1.6.55-1",
"1.6.56-1",
"1.6.57-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46675.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libpng-tools",
"binary_version": "1.6.57-1ubuntu0.1"
},
{
"binary_name": "libpng16-16t64",
"binary_version": "1.6.57-1ubuntu0.1"
}
],
"availability": "No subscription required"
}
}
],
"modified": "2026-10-08T19:47:11.894909838Z",
"provider": "osv",
"upstream": [
"CVE-2026-46675"
],
"references": [
"https://ubuntu.com/security/CVE-2026-46675",
"https://www.cve.org/CVERecord?id=CVE-2026-46675",
"https://github.com/pnggroup/libpng/security/advisories/GHSA-qvg3-h654-xq3j",
"https://github.com/pnggroup/libpng/issues/855",
"https://ubuntu.com/security/notices/USN-8899-1"
]
},
"related_cves": [
{
"value": "CVE-2026-46675",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 104551,
"published_at": "2026-09-29T00:00:00+00:00"
}