Heap Buffer Overflow in PAM Image Buffer Allocation

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Summary

CVECVE-2026-5444
StatePUBLISHED
Assignercertcc
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-09 15:16:16 UTC
Updated2026-04-14 20:20:10 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from ADP

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

EPSS: 0.000190000 probability, percentile 0.050610000 (date 2026-04-13)

Problem Types: CWE-787 | CWE-190 Integer Overflow or Wraparound

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Orthanc-server Orthanc All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Orthanc DICOM Server affected 1.12.10 custom Not specified

References

ReferenceSourceLinkTags
kb.cert.org/vuls/id/536588 [email protected] kb.cert.org Third Party Advisory, VDB Entry
www.orthanc-server.com [email protected] www.orthanc-server.com Product
www.machinespirits.de [email protected] www.machinespirits.de Not Applicable
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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