The Quarterly Threat Landscape Report is out. See what attackers are targeting now.Read report
A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input.
A crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade GraphicsMagick-docUpgrade GraphicsMagick-debuginfoUpgrade GraphicsMagick-develUpgrade GraphicsMagickUpgrade GraphicsMagick-c++-develUpgrade GraphicsMagick-perlUpgrade GraphicsMagick-c++ | Oct 19, 2026 | Oct 19, 2026 |
| Amazon_linux_2023 | — | Upgrade GraphicsMagick-perlUpgrade GraphicsMagick-develUpgrade GraphicsMagick-debugsourceUpgrade GraphicsMagick-perl-debuginfoUpgrade GraphicsMagick-docUpgrade GraphicsMagickUpgrade GraphicsMagick-c++Upgrade GraphicsMagick-c++-develUpgrade GraphicsMagick-debuginfoUpgrade GraphicsMagick-c++-debuginfo | Nov 3, 2026 | Aug 20, 2026 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub