Heap-Based Out-of-Bounds Read Vulnerability in OFFIS DCMTK Software
CVE-2026-44034

4.8MEDIUM

Key Information:

Vendor

Offis

Status
Dcmtk
Vendor
CVE Published:
8 October 2026

What is CVE-2026-44034?

A heap-based out-of-bounds read vulnerability in the DcmRLECodecDecoder::decodeFrame() function of OFFIS DCMTK 3.7.0 allows attackers to access up to 63 bytes of adjacent heap memory when processing a specially crafted RLE Lossless DICOM file. The vulnerability arises from a failure to validate the length of the pixel data fragment before copying 64 bytes, potentially leading to information leakage or application crashes. Applications that decode RLE images frame by frame are particularly at risk. The recent fix has addressed this critical oversight.

Affected Version(s)

DCMTK 3.7.0

References

https://support.dcmtk.org/redmine/issues/1213
issue-trackingvendor-advisory
https://github.com/DCMTK/dcmtk/commit/45469f3c30037e9c715...
patch

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Arjun Basnet from Securin
.