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Bug#1121218: libpng1.6: CVE-2025-64506

From	Salvatore Bonaccorso <carnil@debian.org>
Newsgroups	linux.debian.bugs.dist
Subject	Bug#1121218: libpng1.6: CVE-2025-64506
Date	2025-11-22 20:50 +0100
Message-ID	<LU1Ml-eY9P-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Source: libpng1.6
Version: 1.6.50-1
Severity: important
Tags: security upstream
Forwarded: https://github.com/pnggroup/libpng/pull/749
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for libpng1.6.

CVE-2025-64506[0]:
| Heap buffer over-read in `png_write_image_8bit` with 8-bit input and
| `convert_to_8bit` enabled 

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2025-64506
    https://www.cve.org/CVERecord?id=CVE-2025-64506
[1] https://github.com/pnggroup/libpng/pull/749
[2] https://github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6
[3] https://www.openwall.com/lists/oss-security/2025/11/22/1

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

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Bug#1121218: libpng1.6: CVE-2025-64506 Salvatore Bonaccorso <carnil@debian.org> - 2025-11-22 20:50 +0100

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