DEBIAN-CVE-2026-34757

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Source
https://security-tracker.debian.org/tracker/CVE-2026-34757
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34757.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-34757
Upstream
Published
2026-04-09T15:16:11.003Z
Modified
2026-05-14T09:00:13.998065040Z
Severity
  • 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.0.9 to before 1.6.57, passing a pointer obtained from pnggetPLTE, pnggettRNS, or pnggethIST back into the corresponding setter on the same pngstruct/pnginfo pair causes the setter to read from freed memory and copy its contents into the replacement buffer. The setter frees the internal buffer before copying from the caller-supplied pointer, which now dangles. The freed region may contain stale data (producing silently corrupted chunk metadata) or data from subsequent heap allocations (leaking unrelated heap contents into the chunk struct). This vulnerability is fixed in 1.6.57.

References

Affected packages

Debian:11 / libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/debian/libpng1.6?arch=source&distro=bullseye

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.37-3+deb11u4

Affected versions

1.*
1.6.37-3
1.6.37-3+deb11u1
1.6.37-3+deb11u2
1.6.37-3+deb11u3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34757.json"

Debian:12 / libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/debian/libpng1.6?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.39-2+deb12u5

Affected versions

1.*
1.6.39-2
1.6.39-2+deb12u1
1.6.39-2+deb12u2
1.6.39-2+deb12u3
1.6.39-2+deb12u4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34757.json"

Debian:13 / libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/debian/libpng1.6?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.48-1+deb13u5

Affected versions

1.*
1.6.48-1
1.6.48-1+deb13u1
1.6.48-1+deb13u2
1.6.48-1+deb13u3
1.6.48-1+deb13u4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34757.json"

Debian:14 / libpng1.6

Package

Name
libpng1.6
Purl
pkg:deb/debian/libpng1.6?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.57-1

Affected versions

1.*
1.6.48-1
1.6.49-1~exp1
1.6.50-1~exp1
1.6.50-1
1.6.51-1
1.6.52-1
1.6.53-1
1.6.54-1
1.6.55-1
1.6.56-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34757.json"