MediumFix available
gdcm — security advisory
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.
- Products
- gdcm
- Affected versions
- 3.0.21-1, 3.0.21-2, 3.0.22-1, 3.0.22-2, 3.0.22-2.1, 3.0.22-2.1~exp1, 3.0.22-3, 3.0.24-1, 3.0.24-1+hurd.1, 3.0.24-10, 3.0.24-11, 3.0.24-12, 3.0.24-13, 3.0.24-14, 3.0.24-2, 3.0.24-3, 3.0.24-3+hurd.1, 3.0.24-4, 3.0.24-5, 3.0.24-5+hurd.1, 3.0.24-5+hurd.2, 3.0.24-6, 3.0.24-7, 3.0.24-8, 3.0.24-9
- Fixed versions
- 3.0.24-11
- CVEs
- CVE-2025-11266
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 09:02 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2025-11266
gdcm
Fixed versions: Not specified
gdcm
Fixed versions: Not specified
gdcm
Fixed versions: 3.0.24-11
Complete source record
{
"id": "adb2a89a67b87f7cf72050f2c7cc4f7c594259b953d0cc00b23701a5f71310b3",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2025-11266",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2025-11266",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2025-11266",
"products": [
{
"name": {
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},
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{
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"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
},
{
"value": "3.0.22-1",
"evidence": "/affected/0/versions"
},
{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/1/versions"
},
{
"value": "3.0.24-13",
"evidence": "/affected/1/versions"
},
{
"value": "3.0.24-14",
"evidence": "/affected/1/versions"
},
{
"value": "3.0.24-5",
"evidence": "/affected/1/versions"
},
{
"value": "3.0.24-5+hurd.1",
"evidence": "/affected/1/versions"
},
{
"value": "3.0.24-5+hurd.2",
"evidence": "/affected/1/versions"
},
{
"value": "3.0.24-6",
"evidence": "/affected/1/versions"
},
{
"value": "3.0.24-7",
"evidence": "/affected/1/versions"
},
{
"value": "3.0.24-8",
"evidence": "/affected/1/versions"
},
{
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},
{
"name": {
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},
"prerequisites": [],
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"evidence": "/affected/2/ranges"
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"affected_versions": [
{
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"evidence": "/affected/2/versions"
},
{
"value": "3.0.24-5",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.24-5+hurd.1",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.24-5+hurd.2",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.24-6",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.24-7",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.24-8",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.24-9",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2025-11266",
"aliases": [
"DEBIAN-CVE-2025-11266"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS: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"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "gdcm",
"purl": "pkg:deb/debian/gdcm?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.0.21-1",
"3.0.21-2",
"3.0.22-1",
"3.0.22-2",
"3.0.22-2.1",
"3.0.22-2.1~exp1",
"3.0.22-3",
"3.0.24-1",
"3.0.24-1+hurd.1",
"3.0.24-10",
"3.0.24-11",
"3.0.24-12",
"3.0.24-13",
"3.0.24-14",
"3.0.24-2",
"3.0.24-3",
"3.0.24-3+hurd.1",
"3.0.24-4",
"3.0.24-5",
"3.0.24-5+hurd.1",
"3.0.24-5+hurd.2",
"3.0.24-6",
"3.0.24-7",
"3.0.24-8",
"3.0.24-9"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-11266.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
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"package": {
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"ecosystem": "Debian:13"
},
"versions": [
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"3.0.24-11",
"3.0.24-12",
"3.0.24-13",
"3.0.24-14",
"3.0.24-5",
"3.0.24-5+hurd.1",
"3.0.24-5+hurd.2",
"3.0.24-6",
"3.0.24-7",
"3.0.24-8",
"3.0.24-9"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-11266.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
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{
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},
{
"fixed": "3.0.24-11"
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],
"package": {
"name": "gdcm",
"purl": "pkg:deb/debian/gdcm?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
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"3.0.24-5",
"3.0.24-5+hurd.1",
"3.0.24-5+hurd.2",
"3.0.24-6",
"3.0.24-7",
"3.0.24-8",
"3.0.24-9"
],
"database_specific": {
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},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-08T09:47:28.717867773Z",
"provider": "osv",
"upstream": [
"CVE-2025-11266"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2025-11266"
]
},
"related_cves": [
{
"value": "CVE-2025-11266",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 98874,
"published_at": "2025-12-12T21:15:51.653+00:00"
}