Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2026-08-29 16:35 – Updated: 2026-09-02 17:57

Title

Sudo through 1.9.17p2 Intercept Policy Bypass via execveat

Summary

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

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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-02 17:57 UTC

CWE

CWE-693 - Protection Mechanism Failure

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6430 records in the last 180 days details

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	CPE status
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

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}

RHSA-2026:69123

Vulnerability from csaf_opensuse - Published: 2026-09-21 14:50 - Updated: 2026-09-24 17:53

Summary

Red Hat Security Advisory: sudo security update

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2026-82474.

CVE-2026-82474

A flaw was found in Sudo. This vulnerability allows users who are permitted to run specific commands to bypass security policy checks when using the `execveat` system call in ptrace-based intercept mode. By directly calling `execveat` or `fexecve`, an attacker can execute programs that would otherwise be denied, thereby circumventing policy enforcement and logging mechanisms.

7.8 (High)


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

Fixed: 33 products

https://access.redhat.com/errata/RHSA-2026:69123

Open the full advisory

RHSA-2026:71354

Vulnerability from csaf_redhat - Published: 2026-09-24 07:17 - Updated: 2026-09-24 17:54

Summary

Red Hat Security Advisory: sudo security update

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2026-82474.

CVE-2026-82474

7.8 (High)


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

Fixed: 33 products

https://access.redhat.com/errata/RHSA-2026:71354

Open the full advisory

RHSA-2026:71603

Vulnerability from csaf_redhat - Published: 2026-09-24 11:59 - Updated: 2026-10-19 04:37

Summary

Red Hat Security Advisory: Red Hat Update Infrastructure 5.3 security update

Severity

Important

Scope

52 vulnerabilities in this advisory, including CVE-2026-82474.

CVE-2026-82474

7.8 (High)


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

Fixed: 2 products Known not affected: 3 products

https://access.redhat.com/errata/RHSA-2026:71603

Open the full advisory

UBUNTU-CVE-2026-82474 (CVE-2026-82474)

Vulnerability from osv_ubuntu – Published: 2026-08-29 17:17 – Updated: 2026-09-22 23:43 – Source website

Details

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://www.vulncheck.com/advisories/sudo-through…	REPORT
	https://ubuntu.com/security/notices/USN-8803-1	ADVISORY

JSON

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{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-sudo",
            "binary_version": "1.9.15p5-3ubuntu5.24.04.3"
          },
          {
            "binary_name": "sudo",
            "binary_version": "1.9.15p5-3ubuntu5.24.04.3"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.9.15p5-3ubuntu5.24.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.9.15p5-3ubuntu5.24.04.3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.15p5-3ubuntu5.24.04.3"
            }
          ],
          "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": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-sudo",
            "binary_version": "1.9.17p2-1ubuntu3.1"
          },
          {
            "binary_name": "sudo",
            "binary_version": "1.9.17p2-1ubuntu3.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.9.17p2-1ubuntu3.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.17p2-1ubuntu3.1"
            }
          ],
          "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": "2026-09-22T23:43:56Z",
  "published": "2026-08-29T17:17:00Z",
  "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://www.vulncheck.com/advisories/sudo-through-1.9-17p2-intercept-policy-bypass-via-execveat"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8803-1"
    }
  ],
  "related": [
    "USN-8803-1"
  ],
  "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"
  ]
}

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.

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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.
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UBUNTU-CVE-2026-82474 (CVE-2026-82474)

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