Vulnerability-Lookup

CVE-2026-3994 (GCVE-0-2026-3994)

Vulnerability from cvelistv5 – Published: 2026-03-12 06:02 – Updated: 2026-03-12 14:25

Title

rui314 mold Object File input-files.cc initialize_sections heap-based overflow

Summary

A vulnerability was detected in rui314 mold up to 2.40.4. This issue affects the function mold::ObjectFilemold::X86_64::initialize_sections of the file src/input-files.cc of the component Object File Handler. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Severity

4.8 (Medium)


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

5.3 (Medium)


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

5.3 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-12 14:25 UTC

CWE

CWE-122 - Heap-based Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB mitre root

References

6 references

URL	Tags
https://vuldb.com/?id.350476	vdb-entrytechnical-description
https://vuldb.com/?ctiid.350476	signaturepermissions-required
https://vuldb.com/?submit.769772	third-party-advisory
https://github.com/rui314/mold/issues/1548	issue-tracking
https://github.com/oneafter/0209/blob/main/mo2/repro	exploit
https://github.com/rui314/mold/	product

Impacted products

1 product

Vendor	Product	Version	CPE status
rui314	mold	Affected: 2.40.0 Affected: 2.40.1 Affected: 2.40.2 Affected: 2.40.3 Affected: 2.40.4	guessed

Credits

Oneafter (VulDB User)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-3994

Vulnerability from fkie_nvd - Published: 2026-03-12 06:16 - Updated: 2026-06-17 10:44

Severity

5.3 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/oneafter/0209/blob/main/mo2/repro
	cna@vuldb.com	https://github.com/rui314/mold/
	cna@vuldb.com	https://github.com/rui314/mold/issues/1548
	cna@vuldb.com	https://vuldb.com/?ctiid.350476
	cna@vuldb.com	https://vuldb.com/?id.350476
	cna@vuldb.com	https://vuldb.com/?submit.769772

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "modules": [
            "Object File Handler"
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          "product": "mold",
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              "version": "2.40.2"
            },
            {
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            },
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    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad fue detectada en rui314 mold hasta la versi\u00f3n 2.40.4. Este problema afecta la funci\u00f3n mold::ObjectFilemold::X86_64::initialize_sections del archivo src/input-files.cc del componente Gestor de Archivos de Objeto. Realizar una manipulaci\u00f3n resulta en un desbordamiento de b\u00fafer basado en mont\u00edculo. Atacar localmente es un requisito. El exploit ahora es p\u00fablico y puede ser utilizado. El proyecto fue informado del problema tempranamente a trav\u00e9s de un informe de problema, pero a\u00fan no ha respondido."
    }
  ],
  "id": "CVE-2026-3994",
  "lastModified": "2026-06-17T10:44:35.327",
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.4,
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 1.9,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-3994",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-12T14:25:27.421403Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-12T06:16:32.167",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/oneafter/0209/blob/main/mo2/repro"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/rui314/mold/"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/rui314/mold/issues/1548"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/?ctiid.350476"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/?id.350476"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/?submit.769772"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-W77X-V6V5-9X28

Vulnerability from github – Published: 2026-03-12 06:31 – Updated: 2026-03-12 06:31

Details

Severity

5.3 (Medium)


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

1.9 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-3994"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-12T06:16:32Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability was detected in rui314 mold up to 2.40.4. This issue affects the function mold::ObjectFilemold::X86_64::initialize_sections of the file src/input-files.cc of the component Object File Handler. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.",
  "id": "GHSA-w77x-v6v5-9x28",
  "modified": "2026-03-12T06:31:37Z",
  "published": "2026-03-12T06:31:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3994"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rui314/mold/issues/1548"
    },
    {
      "type": "WEB",
      "url": "https://github.com/oneafter/0209/blob/main/mo2/repro"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rui314/mold"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.350476"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.350476"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.769772"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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",
      "type": "CVSS_V4"
    }
  ]
}

ubuntu-cve-2026-3994

Vulnerability from osv_ubuntu

Published

2026-03-12 06:16

Modified

2026-05-20 15:24

Summary

Details

Severity

5.3 (Medium)


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

1.9 (Low)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-3994	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-3994	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mold",
            "binary_version": "1.0.3+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "mold",
        "purl": "pkg:deb/ubuntu/mold@1.0.3+dfsg-2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.3+dfsg-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mold",
            "binary_version": "2.30.0+dfsg-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "mold",
        "purl": "pkg:deb/ubuntu/mold@2.30.0+dfsg-1build1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.11.0+dfsg-1ubuntu1",
        "2.3.3+dfsg-1",
        "2.4.0+dfsg-1",
        "2.4.1+dfsg-1",
        "2.30.0+dfsg-1",
        "2.30.0+dfsg-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mold",
            "binary_version": "2.37.1+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "mold",
        "purl": "pkg:deb/ubuntu/mold@2.37.1+dfsg-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.37.1+dfsg-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mold",
            "binary_version": "2.40.4+dfsg-2.1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "mold",
        "purl": "pkg:deb/ubuntu/mold@2.40.4+dfsg-2.1ubuntu1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.37.1+dfsg-1",
        "2.40.4+dfsg-2.1ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "A vulnerability was detected in rui314 mold up to 2.40.4. This issue affects the function mold::ObjectFilemold::X86_64::initialize_sections of the file src/input-files.cc of the component Object File Handler. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.",
  "id": "UBUNTU-CVE-2026-3994",
  "modified": "2026-05-20T15:24:30Z",
  "published": "2026-03-12T06:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-3994"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-3994"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-3994"
  ]
}

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.
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

CVE-2026-3994 (GCVE-0-2026-3994)

FKIE_CVE-2026-3994

GHSA-W77X-V6V5-9X28

ubuntu-cve-2026-3994

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature

Related by attack behaviour