UBUNTU-CVE-2026-40930

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Source
https://ubuntu.com/security/CVE-2026-40930
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40930.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-40930
Upstream
Published
2026-06-04T16:16:00Z
Modified
2026-06-12T09:12:04.621679895Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

LIBPNG is a reference library for use in applications that process PNG (Portable Network Graphics) raster image files. In version 1.8.0, three inter-frame chunk discard paths in the push-mode APNG parser clear the chunk-header flag without consuming the chunk body and CRC, allowing attacker-controlled bytes inside an ignored ancillary chunk to be reinterpreted as a fresh chunk header on the next call to png_process_data. Commit faf06924688b62d7c1654b5ceddedbde66ffadb4 fixes the issue.

References

Affected packages

Ubuntu:Pro:20.04:LTS / libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/ubuntu/libpng1.6?arch=source&distro=esm-infra%2Ffocal

Affected ranges

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

Affected versions

1.*
1.6.37-1
1.6.37-2
1.6.37-2ubuntu0.1~esm1
1.6.37-2ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "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-2026-40930.json"

Ubuntu:22.04:LTS / libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/ubuntu/libpng1.6?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.37-3ubuntu0.5",
            "binary_name": "libpng-tools"
        },
        {
            "binary_version": "1.6.37-3ubuntu0.5",
            "binary_name": "libpng16-16"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40930.json"