Vulnerability · Published Dec 12, 2025 · Assigned by icscert
CVE-2025-11266Grassroots DICOM (GDCM) Out-of-bounds Write
Medium 6.6
In plain English
A medium-severity out-of-bounds write in DICOM (GDCM) from Grassroots. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | gdcm | no fix listed | DEBIAN-CVE-2025-11266 |
| Debian:13 | gdcm | no fix listed | DEBIAN-CVE-2025-11266 |
| Debian:14 | gdcm | 3.0.24-11 | DEBIAN-CVE-2025-11266 |
| Ubuntu:22.04:LTS | gdcm | no fix listed | UBUNTU-CVE-2025-11266 |
| Ubuntu:24.04:LTS | gdcm | no fix listed | UBUNTU-CVE-2025-11266 |
| Ubuntu:25.10 | gdcm | no fix listed | UBUNTU-CVE-2025-11266 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Grassroots | DICOM (GDCM) | 0 – through 3.0.24 |
| NumFocus | SimpleITK | 0 – through 2.5.2 |
| medInria | medInria | 0 – through 4.0 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H