MEDIUM 6.1 Microsoft
CVE-2025-64505
LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette index
Microsoft Security Update 2025-Nov: LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette index
Affected Products
- azl3 libpng 1.6.40-1 on Azure Linux 3.0
- cbl2 libpng 1.6.39-1 on CBL Mariner 2.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64505
- https://nvd.nist.gov/vuln/detail/CVE-2025-64505
This medium severity vulnerability with a CVSS score of 6.1 was published on 2025-11-11 via Microsoft. Affected: azl3 libpng 1.6.40-1 on Azure Linux 3.0, cbl2 libpng 1.6.39-1 on CBL Mariner 2.0.
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