A heap buffer overflow vulnerability exists in the PAM image parsing logic. When Orthanc processes a crafted PAM image embedded in a DICOM file, image dimensions are multiplied using 32-bit unsigned arithmetic. Specially chosen values can cause an integer overflow during buffer size calculation, resulting in the allocation of a small buffer followed by a much larger write operation during pixel processing.
History

Fri, 10 Apr 2026 10:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-122
CWE-680

Fri, 10 Apr 2026 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Orthanc
Orthanc dicom Server
Vendors & Products Orthanc
Orthanc dicom Server

Thu, 09 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
Description A heap buffer overflow vulnerability exists in the PAM image parsing logic. When Orthanc processes a crafted PAM image embedded in a DICOM file, image dimensions are multiplied using 32-bit unsigned arithmetic. Specially chosen values can cause an integer overflow during buffer size calculation, resulting in the allocation of a small buffer followed by a much larger write operation during pixel processing.
Title Heap Buffer Overflow in PAM Image Buffer Allocation
References

cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-04-09T14:42:30.696Z

Reserved: 2026-04-02T19:23:20.072Z

Link: CVE-2026-5444

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-09T15:16:16.760

Modified: 2026-04-09T15:16:16.760

Link: CVE-2026-5444

cve-icon Redhat

No data.