orthanc: A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images
CVE-2026-5443 is fixed in orthanc on 1 platform by DEBIAN-CVE-2026-5443 (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 during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication for width and height calculations. If these values overflow, the validation check incorrectly succeeds, allowing the decoder to read and write to memory beyond allocated buffers.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| orthanc · Debian 14 | 1.12.10+dfsg-4 | DEBIAN-CVE-2026-5443 | Apr 9, 2026 |
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