orthanc: A heap buffer overflow vulnerability exists in the DICOM image decoder
CVE-2026-5442 is fixed in orthanc on 1 platform by DEBIAN-CVE-2026-5442 (version 1.12.10+dfsg-4), released April 9, 2026. It is not reported as exploited. Patch Radar priority: Urgent.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| orthanc · Debian 14 | 1.12.10+dfsg-4 | DEBIAN-CVE-2026-5442 | Apr 9, 2026 |
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