[Debian-med-packaging] Bug#1150506: dcmtk: CVE-2026-44038

[Salvatore Bonaccorso]

Source: dcmtk
Version: 3.7.0+really3.7.0-7
X-Debbugs-CC: team at security.debian.org
Severity: important
Tags: security upstream
Forwarded: https://support.dcmtk.org/redmine/issues/1221

Hi,

The following vulnerability was published for dcmtk.

CVE-2026-44038[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-44038
    https://www.cve.org/CVERecord?id=CVE-2026-44038
[1] https://support.dcmtk.org/redmine/issues/1221
[2] https://github.com/DCMTK/dcmtk/commit/d6ae1bc8d5b9ae9c7300013c8c85cc2ea0fd8cf5

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore