Bug 2533857 (CVE-2026-39919)

Summary: CVE-2026-39919 ghostscript: ghostscript: Heap buffer overflow via JPEG 2000 output adapter
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: brclark, rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in Ghostscript. This heap-based buffer overflow vulnerability in the JPEG 2000 output adapter allows an attacker to cause memory corruption by supplying a specially crafted PDF file. The crafted PDF contains a JPEG 2000 image with mismatched component subsampling factors. Successful exploitation could lead to arbitrary code execution.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2537359    
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Description OSIDB Bzimport 2026-09-15 14:51:06 UTC 
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.
Comment 2 Jon Orris 2026-10-01 12:23:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:74464 https://access.redhat.com/errata/RHSA-2026:74464
Comment 3 Jon Orris 2026-10-02 06:21:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:74457 https://access.redhat.com/errata/RHSA-2026:74457
Comment 4 Jon Orris 2026-10-06 22:13:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:76877 https://access.redhat.com/errata/RHSA-2026:76877