Vulnerability Details CVE-2025-64506
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.2%
CVSS Severity
CVSS v3 Score 6.1
References
Products affected by CVE-2025-64506
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cpe:2.3:a:libpng:libpng:1.6.0
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cpe:2.3:a:libpng:libpng:1.6.1
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cpe:2.3:a:libpng:libpng:1.6.10
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cpe:2.3:a:libpng:libpng:1.6.11
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cpe:2.3:a:libpng:libpng:1.6.12
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cpe:2.3:a:libpng:libpng:1.6.13
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cpe:2.3:a:libpng:libpng:1.6.14
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cpe:2.3:a:libpng:libpng:1.6.15
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cpe:2.3:a:libpng:libpng:1.6.16
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cpe:2.3:a:libpng:libpng:1.6.17
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cpe:2.3:a:libpng:libpng:1.6.18
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cpe:2.3:a:libpng:libpng:1.6.18-12
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cpe:2.3:a:libpng:libpng:1.6.19
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cpe:2.3:a:libpng:libpng:1.6.19-13
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cpe:2.3:a:libpng:libpng:1.6.19-14
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cpe:2.3:a:libpng:libpng:1.6.2
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cpe:2.3:a:libpng:libpng:1.6.20
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cpe:2.3:a:libpng:libpng:1.6.20-15
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cpe:2.3:a:libpng:libpng:1.6.20-16
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cpe:2.3:a:libpng:libpng:1.6.21
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cpe:2.3:a:libpng:libpng:1.6.21-17
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cpe:2.3:a:libpng:libpng:1.6.21-18
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cpe:2.3:a:libpng:libpng:1.6.21-19
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cpe:2.3:a:libpng:libpng:1.6.22
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cpe:2.3:a:libpng:libpng:1.6.22-20
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cpe:2.3:a:libpng:libpng:1.6.23
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cpe:2.3:a:libpng:libpng:1.6.23-21
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cpe:2.3:a:libpng:libpng:1.6.24
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cpe:2.3:a:libpng:libpng:1.6.24-22
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cpe:2.3:a:libpng:libpng:1.6.25
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cpe:2.3:a:libpng:libpng:1.6.25-23
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cpe:2.3:a:libpng:libpng:1.6.25-27
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cpe:2.3:a:libpng:libpng:1.6.25-28
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cpe:2.3:a:libpng:libpng:1.6.26
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cpe:2.3:a:libpng:libpng:1.6.26-29
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cpe:2.3:a:libpng:libpng:1.6.26-30
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cpe:2.3:a:libpng:libpng:1.6.26-32
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cpe:2.3:a:libpng:libpng:1.6.26-34
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cpe:2.3:a:libpng:libpng:1.6.26-35
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cpe:2.3:a:libpng:libpng:1.6.27
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cpe:2.3:a:libpng:libpng:1.6.27-37
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cpe:2.3:a:libpng:libpng:1.6.28
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cpe:2.3:a:libpng:libpng:1.6.28-38
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cpe:2.3:a:libpng:libpng:1.6.28-39
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cpe:2.3:a:libpng:libpng:1.6.29
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cpe:2.3:a:libpng:libpng:1.6.29-40
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cpe:2.3:a:libpng:libpng:1.6.29-42
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cpe:2.3:a:libpng:libpng:1.6.29-43
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cpe:2.3:a:libpng:libpng:1.6.3
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cpe:2.3:a:libpng:libpng:1.6.30
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cpe:2.3:a:libpng:libpng:1.6.30-45
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cpe:2.3:a:libpng:libpng:1.6.31
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cpe:2.3:a:libpng:libpng:1.6.31-46
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cpe:2.3:a:libpng:libpng:1.6.32
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cpe:2.3:a:libpng:libpng:1.6.32-48
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cpe:2.3:a:libpng:libpng:1.6.33
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cpe:2.3:a:libpng:libpng:1.6.33-49
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cpe:2.3:a:libpng:libpng:1.6.34
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cpe:2.3:a:libpng:libpng:1.6.34-50
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cpe:2.3:a:libpng:libpng:1.6.34-51
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cpe:2.3:a:libpng:libpng:1.6.34-53
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cpe:2.3:a:libpng:libpng:1.6.35
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cpe:2.3:a:libpng:libpng:1.6.35-54
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cpe:2.3:a:libpng:libpng:1.6.36
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cpe:2.3:a:libpng:libpng:1.6.36-55
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cpe:2.3:a:libpng:libpng:1.6.36-56
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cpe:2.3:a:libpng:libpng:1.6.36-57
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cpe:2.3:a:libpng:libpng:1.6.37
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cpe:2.3:a:libpng:libpng:1.6.37-58
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cpe:2.3:a:libpng:libpng:1.6.38
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cpe:2.3:a:libpng:libpng:1.6.39
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cpe:2.3:a:libpng:libpng:1.6.4
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cpe:2.3:a:libpng:libpng:1.6.40
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cpe:2.3:a:libpng:libpng:1.6.41
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cpe:2.3:a:libpng:libpng:1.6.42
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cpe:2.3:a:libpng:libpng:1.6.43
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cpe:2.3:a:libpng:libpng:1.6.44
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cpe:2.3:a:libpng:libpng:1.6.45
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cpe:2.3:a:libpng:libpng:1.6.46
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cpe:2.3:a:libpng:libpng:1.6.47
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cpe:2.3:a:libpng:libpng:1.6.48
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cpe:2.3:a:libpng:libpng:1.6.49
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cpe:2.3:a:libpng:libpng:1.6.5
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cpe:2.3:a:libpng:libpng:1.6.50
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cpe:2.3:a:libpng:libpng:1.6.6
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cpe:2.3:a:libpng:libpng:1.6.7
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cpe:2.3:a:libpng:libpng:1.6.8
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cpe:2.3:a:libpng:libpng:1.6.9