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dcmtk — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2026-50254

An unauthenticated remote attacker can repeatedly send a single crafted connection request to leak memory. Against storescp in its default single-process mode, memory grows quickly and the service is eventually killed, after which it stops accepting connections until an operator restarts it.

Products
dcmtk
Affected versions
3.6.0-15.1, 3.6.1~20150629-5, 3.6.1~20150924-4, 3.6.1~20150924-5, 3.6.1~20150924-5ubuntu0.1~esm1, 3.6.1~20150924-5ubuntu0.1~esm2, 3.6.1~20150924-5ubuntu0.1~esm3, 3.6.2-2, 3.6.2-2build1, 3.6.2-3, 3.6.2-3build1, 3.6.2-3build2, 3.6.2-3build3, 3.6.2-3ubuntu0.1~esm1, 3.6.2-3ubuntu0.1~esm2, 3.6.2-3ubuntu0.1~esm3, 3.6.4-2.1, 3.6.4-2.1build1, 3.6.4-2.1build2, 3.6.4-2.1ubuntu0.1, 3.6.4-2.1ubuntu0.1+esm1, 3.6.4-2.1ubuntu0.1~esm1, 3.6.4-2.1ubuntu0.2, 3.6.4-2.1ubuntu0.2+esm1, 3.6.5-1, 3.6.6-3ubuntu1, 3.6.6-3ubuntu2, 3.6.6-4, 3.6.6-5, 3.6.6-5ubuntu0.1~esm1, 3.6.6-5ubuntu0.1~esm2, 3.6.7-9, 3.6.7-9.1build2, 3.6.7-9.1build3, 3.6.7-9.1build4, 3.6.7-9.1ubuntu0.1~esm1, 3.6.9-4, 3.6.9-5, 3.6.9-5build1, 3.6.9-6, 3.7.0+really3.6.9-1, 3.7.0+really3.7.0-2, 3.7.0+really3.7.0-5, 3.7.0+really3.7.0-6, 3.7.0+really3.7.0-7ubuntu1
Fixed versions
Not specified
CVEs
CVE-2026-50254
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 02:26 UTC · Revision 1

Source evidence

UBUNTU-CVE-2026-50254

core-osv · Original source

Published 30 Jun 2026, 22:16 UTC

An unauthenticated remote attacker can repeatedly send a single crafted connection request to leak memory. Against storescp in its default single-process mode, memory grows quickly and the service is eventually killed, after which it stops accepting connections until an operator restarts it.

osv:UBUNTU-CVE-2026-50254

dcmtk

Fixed versions: Not specified

dcmtk

Fixed versions: Not specified

dcmtk

Fixed versions: Not specified

dcmtk

Fixed versions: Not specified

dcmtk

Fixed versions: Not specified

dcmtk

Fixed versions: Not specified

dcmtk

Fixed versions: Not specified

dcmtk

Fixed versions: Not specified

Complete source record
{
  "id": "0258091d229357bacff6031e3e77cca3063863e693a88b5a2a8c9a9a019fd3db",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-50254",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-50254",
    "summary": "An unauthenticated remote attacker can repeatedly send a single crafted connection request to leak memory. Against storescp in its default single-process mode, memory grows quickly and the service is eventually killed, after which it stops accepting connections until an operator restarts it.",
    "evidence": "osv:UBUNTU-CVE-2026-50254",
    "products": [
      {
        "name": {
          "value": "dcmtk",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.6.0-15.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.6.1~20150629-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.6.1~20150924-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.6.1~20150924-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.6.1~20150924-5ubuntu0.1~esm1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.6.1~20150924-5ubuntu0.1~esm2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.6.1~20150924-5ubuntu0.1~esm3",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "dcmtk",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.6.2-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.6.2-2build1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.6.2-3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.6.2-3build1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.6.2-3build2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.6.2-3build3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.6.2-3ubuntu0.1~esm1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.6.2-3ubuntu0.1~esm2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.6.2-3ubuntu0.1~esm3",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "dcmtk",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.6.4-2.1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "3.6.4-2.1build1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "3.6.4-2.1build2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "3.6.4-2.1ubuntu0.1~esm1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "3.6.4-2.1ubuntu0.1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "3.6.4-2.1ubuntu0.1+esm1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "3.6.4-2.1ubuntu0.2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "3.6.4-2.1ubuntu0.2+esm1",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "dcmtk",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.6.5-1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "3.6.6-3ubuntu1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "3.6.6-3ubuntu2",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "3.6.6-4",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "3.6.6-5",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "3.6.6-5ubuntu0.1~esm1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "3.6.6-5ubuntu0.1~esm2",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "dcmtk",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.6.7-9",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "3.6.7-9.1build2",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "3.6.7-9.1build3",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "3.6.7-9.1build4",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "3.6.7-9.1ubuntu0.1~esm1",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "dcmtk",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.6.9-4",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "3.6.9-5",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "3.6.9-5build1",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "dcmtk",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.7.0+really3.6.9-1",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "3.7.0+really3.7.0-2",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "3.7.0+really3.7.0-5",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "3.7.0+really3.7.0-6",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "3.7.0+really3.7.0-7ubuntu1",
            "evidence": "/affected/6/versions"
          }
        ]
      },
      {
        "name": {
          "value": "dcmtk",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.6.9-5build1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "3.6.9-6",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "3.7.0+really3.6.9-1",
            "evidence": "/affected/7/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "UBUNTU-CVE-2026-50254",
      "aliases": [
        "UBUNTU-CVE-2026-50254"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        },
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "dcmtk",
            "purl": "pkg:deb/ubuntu/dcmtk?arch=source&distro=esm-apps%2Fxenial",
            "ecosystem": "Ubuntu:Pro:16.04:LTS"
          },
          "versions": [
            "3.6.0-15.1",
            "3.6.1~20150629-5",
            "3.6.1~20150924-4",
            "3.6.1~20150924-5",
            "3.6.1~20150924-5ubuntu0.1~esm1",
            "3.6.1~20150924-5ubuntu0.1~esm2",
            "3.6.1~20150924-5ubuntu0.1~esm3"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50254.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "dcmtk",
                "binary_version": "3.6.1~20150924-5ubuntu0.1~esm3"
              },
              {
                "binary_name": "libdcmtk5",
                "binary_version": "3.6.1~20150924-5ubuntu0.1~esm3"
              }
            ]
          }
        },
        {
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          ],
          "package": {
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            "purl": "pkg:deb/ubuntu/dcmtk?arch=source&distro=esm-apps%2Fbionic",
            "ecosystem": "Ubuntu:Pro:18.04:LTS"
          },
          "versions": [
            "3.6.2-2",
            "3.6.2-2build1",
            "3.6.2-3",
            "3.6.2-3build1",
            "3.6.2-3build2",
            "3.6.2-3build3",
            "3.6.2-3ubuntu0.1~esm1",
            "3.6.2-3ubuntu0.1~esm2",
            "3.6.2-3ubuntu0.1~esm3"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50254.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "dcmtk",
                "binary_version": "3.6.2-3ubuntu0.1~esm3"
              },
              {
                "binary_name": "libdcmtk12",
                "binary_version": "3.6.2-3ubuntu0.1~esm3"
              }
            ]
          }
        },
        {
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            "purl": "pkg:deb/ubuntu/dcmtk?arch=source&distro=esm-apps%2Ffocal",
            "ecosystem": "Ubuntu:Pro:20.04:LTS"
          },
          "versions": [
            "3.6.4-2.1",
            "3.6.4-2.1build1",
            "3.6.4-2.1build2",
            "3.6.4-2.1ubuntu0.1~esm1",
            "3.6.4-2.1ubuntu0.1",
            "3.6.4-2.1ubuntu0.1+esm1",
            "3.6.4-2.1ubuntu0.2",
            "3.6.4-2.1ubuntu0.2+esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50254.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "dcmtk",
                "binary_version": "3.6.4-2.1ubuntu0.2+esm1"
              },
              {
                "binary_name": "libdcmtk14",
                "binary_version": "3.6.4-2.1ubuntu0.2+esm1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
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                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "dcmtk",
            "purl": "pkg:deb/ubuntu/dcmtk?arch=source&distro=esm-apps%2Fjammy",
            "ecosystem": "Ubuntu:Pro:22.04:LTS"
          },
          "versions": [
            "3.6.5-1",
            "3.6.6-3ubuntu1",
            "3.6.6-3ubuntu2",
            "3.6.6-4",
            "3.6.6-5",
            "3.6.6-5ubuntu0.1~esm1",
            "3.6.6-5ubuntu0.1~esm2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50254.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "dcmtk",
                "binary_version": "3.6.6-5ubuntu0.1~esm2"
              },
              {
                "binary_name": "libdcmtk16",
                "binary_version": "3.6.6-5ubuntu0.1~esm2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "dcmtk",
            "purl": "pkg:deb/ubuntu/dcmtk?arch=source&distro=esm-apps%2Fnoble",
            "ecosystem": "Ubuntu:Pro:24.04:LTS"
          },
          "versions": [
            "3.6.7-9",
            "3.6.7-9.1build2",
            "3.6.7-9.1build3",
            "3.6.7-9.1build4",
            "3.6.7-9.1ubuntu0.1~esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50254.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "dcmtk",
                "binary_version": "3.6.7-9.1ubuntu0.1~esm1"
              },
              {
                "binary_name": "libdcmtk17t64",
                "binary_version": "3.6.7-9.1ubuntu0.1~esm1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "dcmtk",
            "purl": "pkg:deb/ubuntu/dcmtk?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "3.6.9-4",
            "3.6.9-5",
            "3.6.9-5build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50254.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "dcmtk",
                "binary_version": "3.6.9-5build1"
              },
              {
                "binary_name": "dcmtk-data",
                "binary_version": "3.6.9-5build1"
              },
              {
                "binary_name": "libdcmtk19",
                "binary_version": "3.6.9-5build1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "dcmtk",
            "purl": "pkg:deb/ubuntu/dcmtk?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "3.7.0+really3.6.9-1",
            "3.7.0+really3.7.0-2",
            "3.7.0+really3.7.0-5",
            "3.7.0+really3.7.0-6",
            "3.7.0+really3.7.0-7ubuntu1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50254.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "dcmtk",
                "binary_version": "3.7.0+really3.7.0-7ubuntu1"
              },
              {
                "binary_name": "dcmtk-data",
                "binary_version": "3.7.0+really3.7.0-7ubuntu1"
              },
              {
                "binary_name": "libdcmtk20",
                "binary_version": "3.7.0+really3.7.0-7ubuntu1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "dcmtk",
            "purl": "pkg:deb/ubuntu/dcmtk?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "3.6.9-5build1",
            "3.6.9-6",
            "3.7.0+really3.6.9-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50254.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "dcmtk",
                "binary_version": "3.7.0+really3.6.9-1"
              },
              {
                "binary_name": "dcmtk-data",
                "binary_version": "3.7.0+really3.6.9-1"
              },
              {
                "binary_name": "libdcmtk19",
                "binary_version": "3.7.0+really3.6.9-1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:58:33.272023117Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-50254"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-50254",
        "https://www.cve.org/CVERecord?id=CVE-2026-50254",
        "https://github.com/DCMTK/dcmtk/releases/tag/latest",
        "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsma-26-181-01.json",
        "https://www.cisa.gov/news-events/ics-medical-advisories/icsma-26-181-01"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-50254",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/1/score"
  },
  "source_id": "core-osv",
  "document_id": 358753,
  "published_at": "2026-06-30T22:16:00+00:00"
}