Vulnerability-Lookup

ubuntu-cve-2026-82623

Vulnerability from osv_ubuntu

Published

2026-08-31 00:00

Modified

2026-08-31 00:00

Summary

Details

A vulnerability was detected in open62541 up to 1.5.5. Affected by this vulnerability is the function UA_DataValue_backend_copyRange of the file plugins/historydata/ua_history_data_backend_memory.c of the component History Backend. The manipulation results in use after free. The attack can be launched remotely. The exploit is now public and may be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

Severity

5.3 (Medium)


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

5.5 (Medium)


                    
                      CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-82623	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-82623	REPORT
	https://github.com/open62541/open62541/issues/8199	REPORT
	https://github.com/open62541/open62541/	REPORT
	https://vuldb.com/cve/CVE-2026-82623	REPORT
	https://vuldb.com/submit/893207	REPORT
	https://vuldb.com/vuln/397123	REPORT
	https://vuldb.com/vuln/397123/cti	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libopen62541-1.4",
            "binary_version": "1.4.11.1-1build1"
          },
          {
            "binary_name": "libopen62541-1.4-tools",
            "binary_version": "1.4.11.1-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "open62541",
        "purl": "pkg:deb/ubuntu/open62541@1.4.11.1-1build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.11.1-1",
        "1.4.11.1-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "A vulnerability was detected in open62541 up to 1.5.5. Affected by this vulnerability is the function UA_DataValue_backend_copyRange of the file plugins/historydata/ua_history_data_backend_memory.c of the component History Backend. The manipulation results in use after free. The attack can be launched remotely. The exploit is now public and may be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.",
  "id": "UBUNTU-CVE-2026-82623",
  "modified": "2026-08-31T00:00:00Z",
  "published": "2026-08-31T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-82623"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-82623"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/open62541/open62541/issues/8199"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/open62541/open62541/"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/cve/CVE-2026-82623"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/submit/893207"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/397123"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/397123/cti"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-82623"
  ]
}

CVE-2026-82623 (GCVE-0-2026-82623)

Vulnerability from cvelistv5 – Published: 2026-08-31 06:15 – Updated: 2026-08-31 16:24

Title

open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free

Summary

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

5.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-31 16:24 UTC

CWE

CWE-416 - Use After Free
CWE-119 - Memory Corruption

Assigner

VulDB mitre root

References

6 references

URL	Tags
https://vuldb.com/vuln/397123	vdb-entrytechnical-description
https://vuldb.com/vuln/397123/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82623	third-party-advisory
https://vuldb.com/submit/893207	third-party-advisory
https://github.com/open62541/open62541/issues/8199	exploitissue-tracking
https://github.com/open62541/open62541/	product

Impacted products

1 product

Vendor	Product	Version
n/a	open62541	Affected: 1.5.0 Affected: 1.5.1 Affected: 1.5.2 Affected: 1.5.3 Affected: 1.5.4 Affected: 1.5.5 cpe:2.3:a:open62541:open62541::::::::

Credits

VULL (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-82623",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-31T16:24:14.514669Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-31T16:24:19.013Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://vuldb.com/submit/893207"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:open62541:open62541:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "History Backend"
          ],
          "product": "open62541",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "1.5.0"
            },
            {
              "status": "affected",
              "version": "1.5.1"
            },
            {
              "status": "affected",
              "version": "1.5.2"
            },
            {
              "status": "affected",
              "version": "1.5.3"
            },
            {
              "status": "affected",
              "version": "1.5.4"
            },
            {
              "status": "affected",
              "version": "1.5.5"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "VULL (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was detected in open62541 up to 1.5.5. Affected by this vulnerability is the function UA_DataValue_backend_copyRange of the file plugins/historydata/ua_history_data_backend_memory.c of the component History Backend. The manipulation results in use after free. The attack can be launched remotely. The exploit is now public and may be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 5,
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "Memory Corruption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-31T06:15:08.682Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-397123 | open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/397123"
        },
        {
          "name": "VDB-397123 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/397123/cti"
        },
        {
          "name": "CVE-2026-82623 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-82623"
        },
        {
          "name": "Submit #893207 | open62541 Project open62541 1.5.5 Use After Free",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/893207"
        },
        {
          "tags": [
            "exploit",
            "issue-tracking"
          ],
          "url": "https://github.com/open62541/open62541/issues/8199"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/open62541/open62541/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-08-30T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-08-30T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-08-30T10:09:59.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free",
      "x_generator": [
        "VulDB PVTS v202608"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-82623",
    "datePublished": "2026-08-31T06:15:08.682Z",
    "dateReserved": "2026-08-30T08:04:53.909Z",
    "dateUpdated": "2026-08-31T16:24:19.013Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

ubuntu-cve-2026-82623

Vulnerability from osv_ubuntu

CVE-2026-82623 (GCVE-0-2026-82623)

Tags

Sightings

Nomenclature