CVE-2026-5442
Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions
- State
- Published
- Severity
- 9.8 Critical
- Published
- Apr 9, 2026
- Updated
- Apr 14, 2026
- Reserved
- Apr 2, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
DICOM ServerOrthanc |
|
References
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