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Critical severity9.8NVD Advisory· Published Sep 15, 2026· Updated Sep 24, 2026

CVE-2026-39919

CVE-2026-39919

Description

Ghostscript before 10.08.0 contains a heap-based buffer overflow vulnerability in the JPEG 2000 output adapter (base/sjpx_openjpeg.c) that allows attackers to cause memory corruption by supplying a crafted PDF containing a JPEG 2000 image with mismatched component subsampling factors. When image components declare different subsampling values, the non-samescale sub-byte-depth output path allocates a row buffer sized for packed output but writes a full byte per output column regardless of bit depth, overflowing the allocation and corrupting internal chunk-allocator metadata to achieve code execution.

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Affected products

13

Patches

Vulnerability mechanics

References

4

News mentions

4