Vulnerability-Lookup

UBUNTU-CVE-2026-5443 (CVE-2026-5443)

Vulnerability from osv_ubuntu – Published: 2026-04-09 15:16 – Updated: 2026-05-20 15:24 – Source website

Details

A heap buffer overflow vulnerability exists during the decoding of PALETTE COLOR DICOM images. Pixel length validation uses 32-bit multiplication for width and height calculations. If these values overflow, the validation check incorrectly succeeds, allowing the decoder to read and write to memory beyond allocated buffers.

Severity

9.8 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-5443	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-5443	REPORT
	https://kb.cert.org/vuls/id/536588	REPORT
	https://www.machinespirits.de/	REPORT
	https://www.orthanc-server.com/	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "orthanc",
            "binary_version": "1.0.0+dfsg-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.0.0+dfsg-1build1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.4+dfsg-1",
        "0.9.4+dfsg-2",
        "0.9.5+dfsg-1",
        "1.0.0+dfsg-1",
        "1.0.0+dfsg-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "orthanc",
            "binary_version": "1.3.1+dfsg-1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.3.1+dfsg-1build2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.0+dfsg-1build1",
        "1.3.0+dfsg-1build2",
        "1.3.1+dfsg-1",
        "1.3.1+dfsg-1build1",
        "1.3.1+dfsg-1build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "orthanc",
            "binary_version": "1.5.8+dfsg-2ubuntu6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.5.8+dfsg-2ubuntu6?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.7+dfsg-2",
        "1.5.8+dfsg-2",
        "1.5.8+dfsg-2ubuntu2",
        "1.5.8+dfsg-2ubuntu3",
        "1.5.8+dfsg-2ubuntu4",
        "1.5.8+dfsg-2ubuntu5",
        "1.5.8+dfsg-2ubuntu6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liborthancframework1",
            "binary_version": "1.10.0+dfsg-1"
          },
          {
            "binary_name": "orthanc",
            "binary_version": "1.10.0+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.10.0+dfsg-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.2+really1.9.1+dfsg-1",
        "1.9.7+dfsg-3ubuntu1",
        "1.9.7+dfsg-3ubuntu2",
        "1.9.7+dfsg-4",
        "1.9.7+dfsg-5",
        "1.9.7+dfsg-6",
        "1.10.0+dfsg-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liborthancframework1",
            "binary_version": "1.12.2+dfsg-1build4"
          },
          {
            "binary_name": "orthanc",
            "binary_version": "1.12.2+dfsg-1build4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.12.2+dfsg-1build4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.12.1+dfsg-3",
        "1.12.1+dfsg-4",
        "1.12.1+dfsg-4build1",
        "1.12.2+dfsg-1",
        "1.12.2+dfsg-1build3",
        "1.12.2+dfsg-1build4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liborthancframework1",
            "binary_version": "1.12.7+dfsg-4build2"
          },
          {
            "binary_name": "orthanc",
            "binary_version": "1.12.7+dfsg-4build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.12.7+dfsg-4build2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.12.6+dfsg-1",
        "1.12.7+dfsg-4",
        "1.12.7+dfsg-4build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liborthancframework1",
            "binary_version": "1.12.10+dfsg-2"
          },
          {
            "binary_name": "orthanc",
            "binary_version": "1.12.10+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "orthanc",
        "purl": "pkg:deb/ubuntu/orthanc@1.12.10+dfsg-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.12.7+dfsg-4build2",
        "1.12.9+dfsg-2",
        "1.12.10+dfsg-1",
        "1.12.10+dfsg-1build1",
        "1.12.10+dfsg-2"
      ]
    }
  ],
  "aliases": [],
  "details": "A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication for width and height calculations. If these values overflow, the validation check incorrectly succeeds, allowing the decoder to read and write to memory beyond allocated buffers.",
  "id": "UBUNTU-CVE-2026-5443",
  "modified": "2026-05-20T15:24:32Z",
  "published": "2026-04-09T15:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5443"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-5443"
    },
    {
      "type": "REPORT",
      "url": "https://kb.cert.org/vuls/id/536588"
    },
    {
      "type": "REPORT",
      "url": "https://www.machinespirits.de/"
    },
    {
      "type": "REPORT",
      "url": "https://www.orthanc-server.com/"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-5443"
  ]
}

CVE-2026-5443 (GCVE-0-2026-5443)

Vulnerability from cvelistv5 – Published: 2026-04-09 14:43 – Updated: 2026-04-14 16:34

Title

Heap Buffer Overflow in DICOM Image Decoder (Palette Color Decode)

Summary

A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication for width and height calculations. If these values overflow, the validation check incorrectly succeeds, allowing the decoder to read and write to memory beyond allocated buffers.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-14 15:10 UTC

CWE

CWE-190 Integer Overflow or Wraparound

Assigner

certcc mitre root

References

3 references

URL	Tags
https://www.orthanc-server.com/
https://www.machinespirits.de/
https://kb.cert.org/vuls/id/536588

Impacted products

1 product

Vendor	Product	Version
Orthanc	DICOM Server	Affected: 0 , ≤ 1.12.10 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-5443",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-14T15:10:56.990073Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-14T16:34:45.930Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "DICOM Server",
          "vendor": "Orthanc",
          "versions": [
            {
              "lessThanOrEqual": "1.12.10",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication for width and height calculations. If these values overflow, the validation check incorrectly succeeds, allowing the decoder to read and write to memory beyond allocated buffers."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-190 Integer Overflow or Wraparound",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-09T14:43:15.227Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://www.orthanc-server.com/"
        },
        {
          "url": "https://www.machinespirits.de/"
        },
        {
          "url": "https://kb.cert.org/vuls/id/536588"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Heap Buffer Overflow in DICOM Image Decoder (Palette Color Decode)",
      "x_generator": {
        "engine": "VINCE 3.0.35",
        "env": "prod",
        "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-5443"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2026-5443",
    "datePublished": "2026-04-09T14:43:15.227Z",
    "dateReserved": "2026-04-02T19:23:06.757Z",
    "dateUpdated": "2026-04-14T16:34:45.930Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

UBUNTU-CVE-2026-5443 (CVE-2026-5443)

CVE-2026-5443 (GCVE-0-2026-5443)

Tags

Sightings

Nomenclature

Related by attack behaviour