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.
History

Thu, 01 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Artifex
Artifex ghostscript
CPEs cpe:2.3:a:artifex:ghostscript:*:*:*:*:*:*:*:*
Vendors & Products Artifex
Artifex ghostscript

Mon, 21 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Sun, 20 Sep 2026 01:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 15 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
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.
Title Ghostscript < 10.08.0 Heap Buffer Overflow via JPEG 2000 Output Adapter
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-15T14:26:06.697Z

Updated: 2026-10-01T15:19:56.598Z

Reserved: 2026-04-07T20:57:06.209Z

Link: CVE-2026-39919

cve-icon Vulnrichment

Updated: 2026-09-20T00:30:39.384Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-15T15:17:14.723

Modified: 2026-09-24T21:04:40.340

Link: CVE-2026-39919

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-15T14:26:06Z

Links: CVE-2026-39919 - Bugzilla