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CVE-2026-44038VulnerabilityPublished Updated

dcmtk · Global Out-of-bounds Read

Affects dcmtkSource GCVE Database

0
Authoritative record:CVE-2026-44038· Medium 4.8

Not known to be exploited · CVSS 4.8 Medium.

Data as of 28 Oct 2026, 22:28 UTC

CVSS 4.0 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10dcmtkpkg:deb/ubuntu/dcmtk?arch=source&distro=stonkingOther threatsAffected
  • 3.7.0+really3.6.9-1 – 3.7.0+really3.7.0-7ubuntu1
5 affected builds
Fixed in–
Ubuntu 26.04 LTSdcmtkpkg:deb/ubuntu/dcmtk?arch=source&distro=resoluteOther threatsAffected
  • =3.6.9-5build1
  • =3.6.9-6
  • =3.7.0+really3.6.9-1
Fixed in–
Ubuntu Pro 24.04 LTSdcmtkpkg:deb/ubuntu/dcmtk?arch=source&distro=esm-apps/nobleOther threatsAffected
  • 3.6.7-9 – 3.6.7-9.1ubuntu0.1~esm1
5 affected builds
Fixed in–
Ubuntu Pro 22.04 LTSdcmtkpkg:deb/ubuntu/dcmtk?arch=source&distro=esm-apps/jammyOther threatsAffected
  • 3.6.5-1 – 3.6.6-5ubuntu0.1~esm2
7 affected builds
Fixed in–
Ubuntu Pro 20.04 LTSdcmtkpkg:deb/ubuntu/dcmtk?arch=source&distro=esm-apps/focalOther threatsAffected
  • 3.6.4-2.1 – 3.6.4-2.1ubuntu0.2+esm1
8 affected builds
Fixed in–
Ubuntu Pro 18.04 LTSdcmtkpkg:deb/ubuntu/dcmtk?arch=source&distro=esm-apps/bionicOther threatsAffected
  • 3.6.2-2 – 3.6.2-3ubuntu0.1~esm3
9 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

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.

References

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