CVE-2026-39919 Ghostscript < 10.08.0 Heap Buffer Overflow via JPEG 2000 Output Adapter

Q: What is CVE-2026-39919?

CVE-2026-39919 is a critical memory corruption vulnerability in Artifex Software Ghostscript, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Q: Is CVE-2026-39919 being exploited?

There is no known exploitation of CVE-2026-39919 in the wild and no public exploit code.

Critical 9.3 Published 15 Sep 2026 Updated 1 Oct 2026

Attackers can achieve code execution by supplying a crafted PDF with mismatched JPEG 2000 subsampling factors to vulnerable Ghostscript versions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-39919?

CVE-2026-39919 is a critical memory corruption vulnerability in Artifex Software Ghostscript, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-122

Which versions are affected by CVE-2026-39919?

Linux distribution packages (40)

`ghostscript` AlmaLinux:10	All versions	`10.02.1-16.el10_2.1`
`ghostscript-doc` AlmaLinux:10	All versions	`10.02.1-16.el10_2.1`
`ghostscript-tools-dvipdf` AlmaLinux:10	All versions	`10.02.1-16.el10_2.1`
`ghostscript-tools-fonts` AlmaLinux:10	All versions	`10.02.1-16.el10_2.1`
`ghostscript-tools-printing` AlmaLinux:10	All versions	`10.02.1-16.el10_2.1`
`libgs` AlmaLinux:10	All versions	`10.02.1-16.el10_2.1`
`libgs-devel` AlmaLinux:10	All versions	`10.02.1-16.el10_2.1`
`ghostscript` AlmaLinux:8	All versions	`9.27-18.el8_10`
`ghostscript-doc` AlmaLinux:8	All versions	`9.27-18.el8_10`
`ghostscript-tools-dvipdf` AlmaLinux:8	All versions	`9.27-18.el8_10`
`ghostscript-tools-fonts` AlmaLinux:8	All versions	`9.27-18.el8_10`
`ghostscript-tools-printing` AlmaLinux:8	All versions	`9.27-18.el8_10`
`ghostscript-x11` AlmaLinux:8	All versions	`9.27-18.el8_10`
`libgs` AlmaLinux:8	All versions	`9.27-18.el8_10`
`libgs-devel` AlmaLinux:8	All versions	`9.27-18.el8_10`
`ghostscript` AlmaLinux:9	All versions	`9.54.0-19.el9_8.1`
`ghostscript-doc` AlmaLinux:9	All versions	`9.54.0-19.el9_8.1`
`ghostscript-tools-dvipdf` AlmaLinux:9	All versions	`9.54.0-19.el9_8.1`
`ghostscript-tools-fonts` AlmaLinux:9	All versions	`9.54.0-19.el9_8.1`
`ghostscript-tools-printing` AlmaLinux:9	All versions	`9.54.0-19.el9_8.1`
`ghostscript-x11` AlmaLinux:9	All versions	`9.54.0-19.el9_8.1`
`libgs` AlmaLinux:9	All versions	`9.54.0-19.el9_8.1`
`libgs-devel` AlmaLinux:9	All versions	`9.54.0-19.el9_8.1`
`libgs` Red Hat:enterprise_linux:10.2	All versions	`0:10.02.1-16.el10_2.1`
`ghostscript` Red Hat:enterprise_linux:8::appstream	All versions	`0:9.27-18.el8_10`
`libgs` Red Hat:enterprise_linux:8::appstream	All versions	`0:9.27-18.el8_10`
`libgs` Red Hat:enterprise_linux:9::appstream	All versions	`0:9.54.0-19.el9_8.1`
`ghostscript` Rocky Linux:10	All versions	`0:10.02.1-16.el10_2.1`
`ghostscript` Rocky Linux:8	All versions	`0:9.27-18.el8_10`
`ghostscript` Rocky Linux:9	All versions	`0:9.54.0-19.el9_8.1`
`ghostscript` SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS	All versions	`9.52-150000.214.1`
`ghostscript` SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS	All versions	`9.52-150000.214.1`
`ghostscript` SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS	All versions	`9.52-150000.214.1`
`ghostscript` SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS	All versions	`9.52-150000.214.1`
`ghostscript` SUSE:Linux Enterprise Module for Basesystem 15 SP7	All versions	`9.52-150000.214.1`
`ghostscript` SUSE:Linux Enterprise Server 12 SP5-LTSS	All versions	`9.52-23.100.1`
`ghostscript` SUSE:Linux Enterprise Server 15 SP4-LTSS	All versions	`9.52-150000.214.1`
`ghostscript` SUSE:Linux Enterprise Server 15 SP5-LTSS	All versions	`9.52-150000.214.1`
`ghostscript` SUSE:Linux Enterprise Server 15 SP6-LTSS	All versions	`9.52-150000.214.1`
`ghostscript` SUSE:Linux Enterprise Server 16.0	All versions	`10.08.0-160000.1.1`

How do I fix CVE-2026-39919?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-39919 being exploited?