UBUNTU-CVE-2026-25646

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Source
https://ubuntu.com/security/CVE-2026-25646
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25646.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-25646
Upstream
Downstream
Related
Published
2026-02-10T18:16:00Z
Modified
2026-02-13T18:13:56.513813Z
Severity
  • 8.3 (High) CVSS_V4 - 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 CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the pngsetquantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer. The images that trigger this vulnerability are valid per the PNG specification. This vulnerability is fixed in 1.6.55.

References

Affected packages

Ubuntu:14.04:LTS
libpng

Package

Name
libpng
Purl
pkg:deb/ubuntu/libpng@1.2.50-1ubuntu2.14.04.3?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.49-4ubuntu1
1.2.49-5ubuntu1
1.2.50-1ubuntu1
1.2.50-1ubuntu2
1.2.50-1ubuntu2.14.04.1
1.2.50-1ubuntu2.14.04.2
1.2.50-1ubuntu2.14.04.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.2.50-1ubuntu2.14.04.3",
            "binary_name": "libpng12-0"
        },
        {
            "binary_version": "1.2.50-1ubuntu2.14.04.3",
            "binary_name": "libpng12-dev"
        },
        {
            "binary_version": "1.2.50-1ubuntu2.14.04.3",
            "binary_name": "libpng3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25646.json"
Ubuntu:22.04:LTS
libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/ubuntu/libpng1.6@1.6.37-3ubuntu0.4?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.37-3ubuntu0.4

Affected versions

1.*
1.6.37-3build4
1.6.37-3build5
1.6.37-3ubuntu0.1
1.6.37-3ubuntu0.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.6.37-3ubuntu0.4",
            "binary_name": "libpng-dev"
        },
        {
            "binary_version": "1.6.37-3ubuntu0.4",
            "binary_name": "libpng-tools"
        },
        {
            "binary_version": "1.6.37-3ubuntu0.4",
            "binary_name": "libpng16-16"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25646.json"
Ubuntu:24.04:LTS
libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/ubuntu/libpng1.6@1.6.43-5ubuntu0.5?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.43-5ubuntu0.5

Affected versions

1.*
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

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.6.43-5ubuntu0.5",
            "binary_name": "libpng-dev"
        },
        {
            "binary_version": "1.6.43-5ubuntu0.5",
            "binary_name": "libpng-tools"
        },
        {
            "binary_version": "1.6.43-5ubuntu0.5",
            "binary_name": "libpng16-16t64"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25646.json"
Ubuntu:25.10
libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/ubuntu/libpng1.6@1.6.50-1ubuntu0.4?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.50-1ubuntu0.4

Affected versions

1.*
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

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.6.50-1ubuntu0.4",
            "binary_name": "libpng-dev"
        },
        {
            "binary_version": "1.6.50-1ubuntu0.4",
            "binary_name": "libpng-tools"
        },
        {
            "binary_version": "1.6.50-1ubuntu0.4",
            "binary_name": "libpng16-16t64"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25646.json"
Ubuntu:Pro:16.04:LTS
libpng

Package

Name
libpng
Purl
pkg:deb/ubuntu/libpng@1.2.54-1ubuntu1.1+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.51-0ubuntu3
1.2.54-1
1.2.54-1ubuntu1
1.2.54-1ubuntu1.1
1.2.54-1ubuntu1.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.2.54-1ubuntu1.1+esm1",
            "binary_name": "libpng12-0"
        },
        {
            "binary_version": "1.2.54-1ubuntu1.1+esm1",
            "binary_name": "libpng12-dev"
        },
        {
            "binary_version": "1.2.54-1ubuntu1.1+esm1",
            "binary_name": "libpng3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25646.json"
libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/ubuntu/libpng1.6@1.6.20-2ubuntu0.1~esm3?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.20-2ubuntu0.1~esm3

Affected versions

1.*
1.6.20-2
1.6.20-2ubuntu0.1~esm1
1.6.20-2ubuntu0.1~esm2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "1.6.20-2ubuntu0.1~esm3",
            "binary_name": "libpng16-16"
        },
        {
            "binary_version": "1.6.20-2ubuntu0.1~esm3",
            "binary_name": "libpng16-dev"
        },
        {
            "binary_version": "1.6.20-2ubuntu0.1~esm3",
            "binary_name": "libpng16-devtools"
        },
        {
            "binary_version": "1.6.20-2ubuntu0.1~esm3",
            "binary_name": "libpng16-tools"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25646.json"
Ubuntu:Pro:18.04:LTS
libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/ubuntu/libpng1.6@1.6.34-1ubuntu0.18.04.2+esm2?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.34-1ubuntu0.18.04.2+esm2

Affected versions

1.*
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

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "1.6.34-1ubuntu0.18.04.2+esm2",
            "binary_name": "libpng-dev"
        },
        {
            "binary_version": "1.6.34-1ubuntu0.18.04.2+esm2",
            "binary_name": "libpng-tools"
        },
        {
            "binary_version": "1.6.34-1ubuntu0.18.04.2+esm2",
            "binary_name": "libpng16-16"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25646.json"
Ubuntu:Pro:20.04:LTS
libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/ubuntu/libpng1.6@1.6.37-2ubuntu0.1~esm2?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.37-2ubuntu0.1~esm2

Affected versions

1.*
1.6.37-1
1.6.37-2
1.6.37-2ubuntu0.1~esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "1.6.37-2ubuntu0.1~esm2",
            "binary_name": "libpng-dev"
        },
        {
            "binary_version": "1.6.37-2ubuntu0.1~esm2",
            "binary_name": "libpng-tools"
        },
        {
            "binary_version": "1.6.37-2ubuntu0.1~esm2",
            "binary_name": "libpng16-16"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25646.json"