Out-of-bounds Read in Offis Dcmtk
CVE-2026-44038
A global out-of-bounds read in the Huffman decoder of the bundled IJG JPEG libraries (dcmjpeg/libijg8, libijg12 and libijg16) of OFFIS DCMTK 3.7.0 allows an attacker to read memory beyond the extend_test[] and extend_offset[] tables, causing incorrectly decoded pixel data or a crash, via a DICOM file with a crafted JPEG stream whose Huffman table defines a difference category above 15. Huffman symbol values are not range-checked unless DCMTK is built with DCMTK_ENABLE_STRICT_HUFFMAN_TABLE_CHECK, which is disabled by default. dcmdjpeg and any application that decompresses JPEG DICOM images with DCMTK are affected. The issue is fixed in commit d6ae1bc8d5b9ae9c7300013c8c85cc2ea0fd8cf5.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Offis Dcmtk — versions 3.7.0
Weakness classification (CWE)
References
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (issue-tracking, vendor-advisory)
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (patch)
Frequently asked questions
- What is CVE-2026-44038?
- CVE-2026-44038 is a medium-severity vulnerability in Offis Dcmtk, classified under Out-of-bounds Read. CVSS score: 4.4/10. Published 2026-10-08.
- How severe is CVE-2026-44038?
- Medium severity. CVSS v3 base score is 4.4 out of 10.