CVE-2026-13606
Description
A flaw was found in GraphicsMagick's Photo CD (PCD) decoder. A remote attacker could exploit this vulnerability by providing a specially crafted PCD file. This could lead to an out-of-bounds write, corrupting memory and potentially causing a denial of service or other unpredictable system behavior.
Statement
This Important flaw in GraphicsMagick's PCD decoder allows an out-of-bounds write when processing a specially crafted PCD file under specific decoding conditions, such as a page/subimage index of 4 or higher, or a size hint of 1536x1024 or greater. This could lead to heap corruption and potentially arbitrary code execution, impacting applications that process untrusted PCD image files.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
Acknowledgements
Red Hat would like to thank Shubham Raj (Causal Security (https://causalsecurity.com/)) for reporting this issue.
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