CVE-2025-11266
CVE-2025-11266 is a medium-severity vulnerability with a CVSS 3.x base score of 6.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Medium (CVSS 3.x base score 6.6)
- CVSS v4: 6.8
- EPSS exploit prediction: 0% (2nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-203169
- Weakness: CWE-787
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2025-11266?
- CVE-2025-11266 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.
- Is CVE-2025-11266 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-11266?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-11266 have an EU (EUVD) identifier?
- Yes. CVE-2025-11266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203169.
- When was CVE-2025-11266 published?
- CVE-2025-11266 was published on 2025-12-12 and last updated on 2026-06-17.
References
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2025/icsma-25-345-01.json
- https://github.com/malaterre/GDCM/releases/tag/v3.2.2
- https://www.cisa.gov/news-events/ics-medical-advisories/icsma-25-345-01
- https://github.com/malaterre/GDCM/commit/5829c95c8ac3afa9a3a3413675e948959c28a789
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