CVE-2026-5442
Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions
Vexday Risk Score
28Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 9.8EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
09 Apr 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Orthanc · DICOM ServerWant to know if your infrastructure is exposed to this?
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