CVE-2026-25794
ImageMagick has heap-buffer-overflow via signed integer overflow in WriteUHDRImage when writing UHDR images with large dimensions
Description
ImageMagick is free and open-source software used for editing and manipulating digital images. `WriteUHDRImage` in `coders/uhdr.c` uses `int` arithmetic to compute the pixel buffer size. Prior to version 7.1.2-15, when image dimensions are large, the multiplication overflows 32-bit `int`, causing an undersized heap allocation followed by an out-of-bounds write. This can crash the process or potentially lead to an out of bounds heap write. Version 7.1.2-15 contains a patch.
How to fix CVE-2026-25794
To remediate CVE-2026-25794, upgrade the affected package to a fixed version below.
- —upgrade to 8:7.1.1.43+dfsg1-1+deb13u6 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —upgrade to 14.10.3 or later
- —
Is CVE-2026-25794 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (20)
- from 0, < 8:7.1.1.43+dfsg1-1+deb13u6
- from 0, < 14.10.3
- from 0, < 14.10.3
- from 0, < 14.10.3
- from 0, < 14.10.3
- from 0, < 14.10.3
- from 0, < 14.10.3
- from 0, < 14.10.3
- from 0, < 14.10.3
- from 0, < 14.10.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |