CVE-2026-23876 — Heap buffer overflow with attacker-controlled data in XBM parser

Affected: ImageMagick, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 6

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-13 and 6.9.13-38, a heap buffer overflow vulnerability in the XBM image decoder (ReadXBMImage) allows an attacker to write controlled data past the allocated heap buffer when processing a maliciously crafted image file. Any operation that reads or identifies an image can trigger the overflow, making it exploitable via common image upload and processing pipelines. Versions 7.1.2-13 and 6.9.13-38 fix the issue.

USN-8021-1 — imagemagick vulnerability

Affected: Ubuntu:Pro:14.04:LTS: imagemagick, Ubuntu:Pro:16.04:LTS: imagemagick, Ubuntu:Pro:18.04:LTS: imagemagick, Ubuntu:Pro:20.04:LTS: imagemagick, Ubuntu:Pro:22.04:LTS: imagemagick, Ubuntu:Pro:24.04:LTS: imagemagick

Benny Isaacs discovered that ImageMagick did not properly manage memory when processing certain image files. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code.

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CVE-2026-23876 — Heap buffer overflow with attacker-controlled data in XBM parser

USN-8021-1 — imagemagick vulnerability