CVE-2026-97059 DCMTK through 3.7.0 Heap Over-read via NumberOfFrames
Attackers can cause crashes or leak memory by sending crafted DICOM files with mismatched frame counts to applications using DCMTK.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-97059?
CVE-2026-97059 is a high-severity memory corruption vulnerability in OFFIS DCMTK, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
DCMTK through 3.7.0 contains a heap over-read vulnerability in ConcatenationLoader that copies pixel data frames without validating the PixelData buffer length against the declared NumberOfFrames. Attackers can craft malicious DICOM instances declaring more frames than the buffer contains to trigger heap over-reads that crash the application or leak adjacent heap memory.
Weakness: CWE-125
Which versions are affected by CVE-2026-97059?
How do I fix CVE-2026-97059?
No fix has been published for CVE-2026-97059 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-97059 being exploited?
There is no known exploitation of CVE-2026-97059 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-97059, GHSA-4pm7-3ffj-xfrq, UBUNTU-CVE-2026-97059.