CVE-2026-5442 — Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions

CVE-2026-5442

Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
Orthanc / DICOM Server	affected 0 through 1.12.10

CWE

No CWE identifiers supplied.

References

https://www.orthanc-server.com/
https://www.machinespirits.de/
https://kb.cert.org/vuls/id/536588

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.