CVE-2026-103226: Artifex Ghostscript Pdfwrite gdevpsfx.c type1_callsubr stack-based overflow

Vulnerability summary

CVE-2026-103226 is a high (CVSS 7.5) vulnerability in artifex ghostscript. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 24.8% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 30-09-2026
   PublishedVulnerability first disclosed.
2. 15-10-2026
   Last modifiedVulnerability information updated.

Description

A vulnerability was identified in Artifex Ghostscript up to 10.07.0. Affected is the function type1_callsubr of the file devices/vector/gdevpsfx.c of the component Pdfwrite. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used. Upgrading to version 10.08.0 is able to address this issue. It is suggested to upgrade the affected component. A solution was implemented: "I've chosen to fix this slightly differently by using the defined macro in the font parsing loop rather than in the callsubr function, because this better matches the pattern of 'normal' usage."

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.
• CWE-121Stack-based Buffer OverflowThe product writes past the end of a buffer that was allocated on the stack.