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CVE-2025-11266

Grassroots DICOM (GDCM) Out-of-bounds Write

6.8 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Active

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
High

Exploit likelihood

0.15%Up 0.1 points since Dec 13, 2025
90%50%10%1%

What each source reports

CVE List Score used 6.8

Grassroots DICOM (GDCM) Out-of-bounds Write

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.

Record
CVE-2025-11266
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
6.6 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Weakness
CWE-787
Updated
2026-11-02
EUVDEUVD-2025-203169 6.8

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.

Record
EUVD-2025-203169
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-7qcj-ww2g-7w6j 6.8

An out-of-bounds write vulnerability exists in the Grassroots DICOM library (GDCM). The issue is...

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.

Record
GHSA-7qcj-ww2g-7w6j
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.6 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Weakness
CWE-787
Updated
2026-11-02
NVD 6.8

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.

Record
CVE-2025-11266
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.6 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Weakness
CWE-787
Updated
2026-11-02
OSV 6.8

Grassroots DICOM (GDCM) Out-of-bounds Write

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.

Record
CVE-2025-11266
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-787
Updated
2026-11-02
OSVDEBIAN-CVE-2025-11266 6.8

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.

Record
DEBIAN-CVE-2025-11266
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVUBUNTU-CVE-2025-11266 6.8

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.

Record
UBUNTU-CVE-2025-11266
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
6.6 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
gdcm
Debian:12
All versions, plus listed versions
3.0.21-13.0.21-23.0.22-13.0.22-23.0.22-2.1
Show 20 moreShow less
3.0.22-2.1~exp13.0.22-33.0.24-13.0.24-1+hurd.13.0.24-103.0.24-113.0.24-123.0.24-133.0.24-143.0.24-23.0.24-33.0.24-3+hurd.13.0.24-43.0.24-53.0.24-5+hurd.13.0.24-5+hurd.23.0.24-63.0.24-73.0.24-83.0.24-9
None known
gdcm
Debian:13
All versions, plus listed versions
3.0.24-103.0.24-113.0.24-123.0.24-133.0.24-14
Show 7 moreShow less
3.0.24-53.0.24-5+hurd.13.0.24-5+hurd.23.0.24-63.0.24-73.0.24-83.0.24-9
None known
gdcm
Debian:14
before 3.0.24-11, plus listed versions
3.0.24-103.0.24-53.0.24-5+hurd.13.0.24-5+hurd.23.0.24-63.0.24-73.0.24-83.0.24-9
3.0.24-11
gdcm
Ubuntu:Pro:14.04:LTS
All versions, plus listed versions
2.2.3-2ubuntu32.2.3-2ubuntu42.2.4-1.1ubuntu12.2.4-1.1ubuntu22.2.4-1.1ubuntu32.2.4-1.1ubuntu42.2.4-1.1ubuntu4+esm1
None known
gdcm
Ubuntu:16.04:LTS
All versions, plus listed versions
2.4.4-42.4.4-4build12.4.4-4ubuntu12.6.1-32.6.2-1
Show 7 moreShow less
2.6.2-22.6.2-32.6.3-12.6.3-1ubuntu12.6.3-2ubuntu12.6.3-3ubuntu12.6.3-3ubuntu3
None known
gdcm
Ubuntu:18.04:LTS
All versions, plus listed versions
2.8.2-3build12.8.3-12.8.4-12.8.4-1build2
None known
gdcm
Ubuntu:20.04:LTS
All versions, plus listed versions
2.8.8-9ubuntu42.8.8-9ubuntu53.0.4-23.0.4-2build13.0.4-2ubuntu13.0.5-1ubuntu13.0.5-1.1ubuntu13.0.5-1.1ubuntu2
None known
gdcm
Ubuntu:22.04:LTS
All versions, plus listed versions
3.0.8-23.0.10-13.0.10-1build2
None known
gdcm
Ubuntu:24.04:LTS
All versions, plus listed versions
3.0.21-23.0.22-13.0.22-2build13.0.22-2build23.0.22-2.1build13.0.22-2.1build23.0.22-2.1ubuntu1
None known
gdcm
Ubuntu:25.10
All versions, plus listed versions
3.0.24-5ubuntu23.0.24-5ubuntu3
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-11266 is a medium vulnerability (CVSS 6.8) in Grassroots Dicom (gdcm), published December 12, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 3rd percentile. Fixed in gdcm 3.0.24-11.

References

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