usn-8039-1
Vulnerability from osv_ubuntu
Published
2026-02-12 18:00
Modified
2026-06-30 15:54
Summary
libpng1.6 vulnerability
Details
It was discovered that the libpng simplified API incorrectly handled quantizing RGB images. If a user or automated system were tricked into opening a specially crafted PNG file, an attacker could use this issue to cause libpng to crash, resulting in a denial of service.
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-25646",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libpng-tools",
"binary_version": "1.6.37-3ubuntu0.4"
},
{
"binary_name": "libpng16-16",
"binary_version": "1.6.37-3ubuntu0.4"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "libpng1.6",
"purl": "pkg:deb/ubuntu/libpng1.6@1.6.37-3ubuntu0.4?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.37-3ubuntu0.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.37-3build4",
"1.6.37-3build5",
"1.6.37-3ubuntu0.1",
"1.6.37-3ubuntu0.3"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-25646",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:24.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libpng-tools",
"binary_version": "1.6.43-5ubuntu0.5"
},
{
"binary_name": "libpng16-16t64",
"binary_version": "1.6.43-5ubuntu0.5"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "libpng1.6",
"purl": "pkg:deb/ubuntu/libpng1.6@1.6.43-5ubuntu0.5?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.43-5ubuntu0.5"
}
],
"type": "ECOSYSTEM"
}
],
"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"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-25646",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:25.10"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libpng-tools",
"binary_version": "1.6.50-1ubuntu0.4"
},
{
"binary_name": "libpng16-16t64",
"binary_version": "1.6.50-1ubuntu0.4"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "libpng1.6",
"purl": "pkg:deb/ubuntu/libpng1.6@1.6.50-1ubuntu0.4?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.50-1ubuntu0.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.47-1.1",
"1.6.48-1",
"1.6.49-1~exp1",
"1.6.50-1~exp1",
"1.6.50-1",
"1.6.50-1ubuntu0.1",
"1.6.50-1ubuntu0.3"
]
}
],
"aliases": [],
"details": "It was discovered that the libpng simplified API incorrectly handled\nquantizing RGB images. If a user or automated system were tricked into\nopening a specially crafted PNG file, an attacker could use this issue to\ncause libpng to crash, resulting in a denial of service.",
"id": "USN-8039-1",
"modified": "2026-06-30T15:54:50Z",
"published": "2026-02-12T18:00:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8039-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-25646"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "libpng1.6 vulnerability",
"upstream": [
"UBUNTU-CVE-2026-25646"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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