Vulnerability Details CVE-2026-78465
A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only. When processing a PCX image file, the plugin calculates memory allocation sizes based on the image dimensions and the number of color planes. If a crafted file sets the number of planes to 4 alongside sufficiently large dimensions, the calculation exceeds the 32-bit integer limit and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when the plugin subsequently writes image data into the undersized buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 3.4%
CVSS Severity
CVSS v3 Score 7.0
References
Products affected by CVE-2026-78465
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cpe:2.3:a:gimp:gimp:3.0.0
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cpe:2.3:a:gimp:gimp:3.0.2
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cpe:2.3:a:gimp:gimp:3.0.4
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cpe:2.3:a:gimp:gimp:3.0.6
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cpe:2.3:a:gimp:gimp:3.0.8
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cpe:2.3:a:gimp:gimp:3.1.2
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cpe:2.3:a:gimp:gimp:3.1.4
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cpe:2.3:a:gimp:gimp:3.1.4.1
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cpe:2.3:a:gimp:gimp:3.2.0
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cpe:2.3:a:gimp:gimp:3.2.4
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cpe:2.3:a:gimp:gimp:3.3.1