CVE-2026-5442: Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions
A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. This causes an integer overflow during frame size calculation and results in out-of-bounds memory access during image decoding.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-5442?
CVE-2026-5442 has been classified as a high severity vulnerability due to the potential for remote code execution.
How do I fix CVE-2026-5442?
To fix CVE-2026-5442, upgrade Orthanc server to version 1.12.11 or later.
What systems are affected by CVE-2026-5442?
CVE-2026-5442 affects versions of Orthanc server below 1.12.11.
What type of vulnerability is CVE-2026-5442?
CVE-2026-5442 is a heap buffer overflow vulnerability.
Can CVE-2026-5442 lead to data theft?
Yes, CVE-2026-5442 can potentially lead to data theft through exploitation of the buffer overflow.