Buffer overflow in Grassroots Dicom (Gdcm)
CVE-2025-11266
An out-of-bounds write vulnerability exists in the Grassroots DICOM library (GDCM). The issue is triggered during parsing of a malformed DICOM file containing encapsulated PixelData fragments (compressed image data stored as multiple fragments). This vulnerability leads to a segmentation fault caused by an out-of-bounds memory access due to unsigned integer underflow in buffer indexing. It is exploitable via file input, simply opening a crafted malicious DICOM file is sufficient to trigger the crash, resulting in a denial-of-service condition.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.001 (3.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- Grassroots Dicom (Gdcm) — versions 0
- Medinria — versions 0
- Numfocus Simpleitk — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-11266?
- CVE-2025-11266 is a medium-severity vulnerability in Grassroots Dicom (Gdcm), classified under Out-of-bounds Write. CVSS score: 6.6/10. Published 2025-12-12.
- How severe is CVE-2025-11266?
- Medium severity. CVSS v3 base score is 6.6 out of 10.