CVE-2026-109964
ImageMagick before 7.1.2-33 and 6.9.13-58 Heap Buffer Underwrite in PICT Decoder
- State
- Published
- Severity
- 6.3 Medium
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Reserved
- Oct 13, 2026
Description
ImageMagick before 7.1.2-33 and 6.9.13-58 contains a heap buffer underwrite vulnerability in DecodeImage() in coders/pict.c on 32-bit builds due to pointer arithmetic overflow. Attackers can supply a crafted PICT file with maximized row, column and bytes-per-line values to bypass bounds checks and write up to 128 controlled bytes below the heap buffer, causing crashes or code execution.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.6 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L | VulnCheck |
Weaknesses
- CWE-124 Buffer Underwrite ('Buffer Underflow')
Affected Products
| Product | Versions |
|---|---|
ImageMagickImageMagick |
|
References
- GitHub Security Advisory (GHSA-mqmp-r5jh-jx7w)vendor-advisory
- https://github.com/ImageMagick/ImageMagick/commit/63dde0cf281383ab69432b88305f7dcd6a8ce900patch
- https://github.com/ImageMagick/ImageMagick6/commit/c18c5d5fb7f1d87ddbe0a02e9d1207c89b24588cpatch
- https://github.com/ImageMagick/ImageMagick/blob/7.1.2-32/coders/pict.c#L503-L540technical-description
- https://github.com/ImageMagick/ImageMagickproduct
- VulnCheck Advisory: ImageMagick before 7.1.2-33 and 6.9.13-58 Heap Buffer Underwrite in PICT Decoderthird-party-advisory
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