Vulnerability-Lookup

ubuntu-cve-2026-82474

Vulnerability from osv_ubuntu

Published

2026-08-31 00:00

Modified

2026-08-31 00:00

Summary

Details

Sudo through 1.9.17p2 fails to apply intercept policy checks to the execveat system call in ptrace-based intercept mode. Users permitted to run specific commands can execute denied programs by calling execveat directly or through fexecve, bypassing policy enforcement and logging.

Severity

7.8 (High)


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

8.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-82474	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-82474	REPORT
	https://github.com/sudo-project/sudo/commit/71fbe…	REPORT
	https://github.com/sudo-project/sudo	REPORT
	https://github.com/sudo-project/sudo/blob/v1.9.17…	REPORT
	https://www.vulncheck.com/advisories/sudo-through…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.9p5-1ubuntu1.5+esm8"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.9p5-1ubuntu1.5+esm8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.9p5-1ubuntu1.5+esm8?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.6p3-0ubuntu3",
        "1.8.8-2ubuntu1",
        "1.8.8-2ubuntu2",
        "1.8.9p4-1ubuntu1",
        "1.8.9p4-1ubuntu2",
        "1.8.9p5-1ubuntu1",
        "1.8.9p5-1ubuntu1.1",
        "1.8.9p5-1ubuntu1.2",
        "1.8.9p5-1ubuntu1.3",
        "1.8.9p5-1ubuntu1.4",
        "1.8.9p5-1ubuntu1.5+esm1",
        "1.8.9p5-1ubuntu1.5+esm2",
        "1.8.9p5-1ubuntu1.5+esm3",
        "1.8.9p5-1ubuntu1.5+esm5",
        "1.8.9p5-1ubuntu1.5+esm6",
        "1.8.9p5-1ubuntu1.5+esm7",
        "1.8.9p5-1ubuntu1.5+esm8"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.16-0ubuntu1.10+esm3"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.16-0ubuntu1.10+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.16-0ubuntu1.10+esm3?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.12-1ubuntu3",
        "1.8.16-0ubuntu1",
        "1.8.16-0ubuntu1.1",
        "1.8.16-0ubuntu1.2",
        "1.8.16-0ubuntu1.3",
        "1.8.16-0ubuntu1.4",
        "1.8.16-0ubuntu1.5",
        "1.8.16-0ubuntu1.6",
        "1.8.16-0ubuntu1.7",
        "1.8.16-0ubuntu1.8",
        "1.8.16-0ubuntu1.9",
        "1.8.16-0ubuntu1.10",
        "1.8.16-0ubuntu1.10+esm1",
        "1.8.16-0ubuntu1.10+esm2",
        "1.8.16-0ubuntu1.10+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.21p2-3ubuntu1.6+esm1"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.21p2-3ubuntu1.6+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.21p2-3ubuntu1.6+esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.20p2-1ubuntu1",
        "1.8.21p2-2ubuntu1",
        "1.8.21p2-3ubuntu1",
        "1.8.21p2-3ubuntu1.1",
        "1.8.21p2-3ubuntu1.2",
        "1.8.21p2-3ubuntu1.3",
        "1.8.21p2-3ubuntu1.4",
        "1.8.21p2-3ubuntu1.5",
        "1.8.21p2-3ubuntu1.6",
        "1.8.21p2-3ubuntu1.6+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.31-1ubuntu1.5+esm1"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.31-1ubuntu1.5+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.31-1ubuntu1.5+esm1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.27-1ubuntu4",
        "1.8.29-1ubuntu1",
        "1.8.31-1ubuntu1",
        "1.8.31-1ubuntu1.1",
        "1.8.31-1ubuntu1.2",
        "1.8.31-1ubuntu1.4",
        "1.8.31-1ubuntu1.5",
        "1.8.31-1ubuntu1.5+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.9.9-1ubuntu2.6"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.9.9-1ubuntu2.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.9.9-1ubuntu2.6?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.5p2-3ubuntu2",
        "1.9.9-1ubuntu2",
        "1.9.9-1ubuntu2.1",
        "1.9.9-1ubuntu2.2",
        "1.9.9-1ubuntu2.3",
        "1.9.9-1ubuntu2.4",
        "1.9.9-1ubuntu2.5",
        "1.9.9-1ubuntu2.6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnss-sudo",
            "binary_version": "1.9.15p5-3ubuntu5.24.04.2"
          },
          {
            "binary_name": "sudo",
            "binary_version": "1.9.15p5-3ubuntu5.24.04.2"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.9.15p5-3ubuntu5.24.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.9.15p5-3ubuntu5.24.04.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.14p2-1ubuntu1",
        "1.9.15p5-3ubuntu1",
        "1.9.15p5-3ubuntu3",
        "1.9.15p5-3ubuntu4",
        "1.9.15p5-3ubuntu5",
        "1.9.15p5-3ubuntu5.24.04.1",
        "1.9.15p5-3ubuntu5.24.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnss-sudo",
            "binary_version": "1.9.17p2-1ubuntu3"
          },
          {
            "binary_name": "sudo",
            "binary_version": "1.9.17p2-1ubuntu3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.9.17p2-1ubuntu3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.17p2-1ubuntu1",
        "1.9.17p2-1ubuntu2",
        "1.9.17p2-1ubuntu3"
      ]
    }
  ],
  "aliases": [],
  "details": "Sudo through 1.9.17p2 fails to apply intercept policy checks to the execveat system call in ptrace-based intercept mode. Users permitted to run specific commands can execute denied programs by calling execveat directly or through fexecve, bypassing policy enforcement and logging.",
  "id": "UBUNTU-CVE-2026-82474",
  "modified": "2026-08-31T00:00:00Z",
  "published": "2026-08-31T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-82474"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-82474"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/sudo-project/sudo/commit/71fbe42dcd5a1c8f799540583a2dfb2ae6221edf"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/sudo-project/sudo"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/sudo-project/sudo/blob/v1.9.17p2/src/exec_ptrace.c"
    },
    {
      "type": "REPORT",
      "url": "https://www.vulncheck.com/advisories/sudo-through-1.9-17p2-intercept-policy-bypass-via-execveat"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-82474"
  ]
}

CVE-2026-82474 (GCVE-0-2026-82474)

Vulnerability from cvelistv5 – Published: 2026-08-29 16:35 – Updated: 2026-08-29 16:35

Title

Sudo through 1.9.17p2 Intercept Policy Bypass via execveat

Summary

Severity

8.5 (High)


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

7.8 (High)


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

CWE

CWE-693 - Protection Mechanism Failure

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/sudo-project/sudo/commit/71fbe…	patch
https://github.com/sudo-project/sudo/blob/v1.9.17…	technical-description
https://github.com/sudo-project/sudo	product
https://www.vulncheck.com/advisories/sudo-through…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sudo-project	sudo	Affected: 0 , ≤ 1.9.17p2 (custom) cpe:2.3:a:sudo_project:sudo::::::::

Date Public

2026-03-20 00:00

Credits

XlabAI Team of Tencent Xuanwu Lab Guannan Wang Zhanpeng Liu Guancheng Li Nofil Qasim Quentin Chalabi

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "sudo",
          "vendor": "sudo-project",
          "versions": [
            {
              "lessThanOrEqual": "1.9.17p2",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "1.9.17p2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "XlabAI Team of Tencent Xuanwu Lab"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Guannan Wang"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Zhanpeng Liu"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Guancheng Li"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Nofil Qasim"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Quentin Chalabi"
        }
      ],
      "datePublic": "2026-03-20T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Sudo through 1.9.17p2 fails to apply intercept policy checks to the execveat system call in ptrace-based intercept mode. Users permitted to run specific commands can execute denied programs by calling execveat directly or through fexecve, bypassing policy enforcement and logging."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-693",
              "description": "Protection Mechanism Failure",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T16:35:33.836Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/sudo-project/sudo/commit/71fbe42dcd5a1c8f799540583a2dfb2ae6221edf"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/sudo-project/sudo/blob/v1.9.17p2/src/exec_ptrace.c"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/sudo-project/sudo"
        },
        {
          "name": "VulnCheck Advisory: Sudo through 1.9.17p2 Intercept Policy Bypass via execveat",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/sudo-through-1.9-17p2-intercept-policy-bypass-via-execveat"
        }
      ],
      "title": "Sudo through 1.9.17p2 Intercept Policy Bypass via execveat",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-82474",
    "datePublished": "2026-08-29T16:35:33.836Z",
    "dateReserved": "2026-08-29T14:11:14.262Z",
    "dateUpdated": "2026-08-29T16:35:33.836Z",
    "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-2026-82474

Vulnerability from osv_ubuntu

CVE-2026-82474 (GCVE-0-2026-82474)

Tags

Sightings

Nomenclature