RHSA-2026:65569

Vulnerability from csaf_redhat - Published: 2026-09-08 17:19 - Updated: 2026-09-21 17:12
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: sudo: * sudo-1.9.17-16.p2.1.hum1 (aarch64, x86_64) * sudo-devel-1.9.17-16.p2.1.hum1 (aarch64, x86_64) * sudo-logsrvd-1.9.17-16.p2.1.hum1 (aarch64, x86_64) * sudo-python-plugin-1.9.17-16.p2.1.hum1 (aarch64, x86_64) * sudo-1.9.17-16.p2.1.hum1.src (src)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2026-35535

A flaw was found in Sudo. A local user could exploit a failure in the setuid, setgid, or setgroups calls, which are used to drop privileges before running the mailer. This oversight allows for privilege escalation, enabling the user to gain elevated access on the system.

7.4 (High)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-272 - Least Privilege Violation
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:sudo-0:1.9.17-16.p2.1.hum1@aarch64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:sudo-0:1.9.17-16.p2.1.hum1@src —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:sudo-0:1.9.17-16.p2.1.hum1@x86_64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:sudo-devel-0:1.9.17-16.p2.1.hum1@aarch64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:sudo-devel-0:1.9.17-16.p2.1.hum1@x86_64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:sudo-logsrvd-0:1.9.17-16.p2.1.hum1@aarch64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:sudo-logsrvd-0:1.9.17-16.p2.1.hum1@x86_64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:sudo-python-plugin-0:1.9.17-16.p2.1.hum1@aarch64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:sudo-python-plugin-0:1.9.17-16.p2.1.hum1@x86_64 —
Vendor Fix fix
Threats
Impact Important
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
CWE-1220 - Insufficient Granularity of Access Control
Affected products
Fixed 9 products, the same list as for CVE-2026-35535
Threats
Impact Important
References
To clipboard 

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    {
      "cve": "CVE-2026-35535",
      "cwe": {
        "id": "CWE-272",
        "name": "Least Privilege Violation"
      },
      "discovery_date": "2026-04-03T03:01:03.124541+00:00",
      "ids": [
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          "text": "2454714"
        }
      ],
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        {
          "category": "description",
          "text": "A flaw was found in Sudo. A local user could exploit a failure in the setuid, setgid, or setgroups calls, which are used to drop privileges before running the mailer. This oversight allows for privilege escalation, enabling the user to gain elevated access on the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "sudo: Sudo: Privilege escalation due to failure in privilege drop calls",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "url": "https://access.redhat.com/security/cve/CVE-2026-35535"
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2454714"
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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-35535"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-35535",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35535"
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        {
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          "summary": "https://bugs.debian.org/1130593",
          "url": "https://bugs.debian.org/1130593"
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          "url": "https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/2143042"
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          "date": "2026-09-08T17:19:41+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
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          "restart_required": {
            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2026:65569"
        }
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "sudo: Sudo: Privilege escalation due to failure in privilege drop calls"
    },
    {
      "cve": "CVE-2026-82474",
      "cwe": {
        "id": "CWE-1220",
        "name": "Insufficient Granularity of Access Control"
      },
      "discovery_date": "2026-08-29T16:40:54.539576+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2525889"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "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.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "sudo: Sudo: Policy bypass allows unauthorized program execution via execveat",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability in Sudo allows a local attacker, already authorized to run specific commands, to bypass configured policy restrictions. By directly invoking `execveat` or `fexecve` when Sudo is operating in ptrace-based intercept mode, an attacker can execute programs otherwise denied by `sudo` policies. This undermines granular access control and could lead to unauthorized command execution on affected Red Hat systems.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-82474"
        },
        {
          "category": "external",
          "summary": "RHBZ#2525889",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2525889"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-82474",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-82474"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-82474",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82474"
        },
        {
          "category": "external",
          "summary": "https://github.com/sudo-project/sudo",
          "url": "https://github.com/sudo-project/sudo"
        },
        {
          "category": "external",
          "summary": "https://github.com/sudo-project/sudo/blob/v1.9.17p2/src/exec_ptrace.c",
          "url": "https://github.com/sudo-project/sudo/blob/v1.9.17p2/src/exec_ptrace.c"
        },
        {
          "category": "external",
          "summary": "https://github.com/sudo-project/sudo/commit/71fbe42dcd5a1c8f799540583a2dfb2ae6221edf",
          "url": "https://github.com/sudo-project/sudo/commit/71fbe42dcd5a1c8f799540583a2dfb2ae6221edf"
        },
        {
          "category": "external",
          "summary": "https://www.vulncheck.com/advisories/sudo-through-1.9-17p2-intercept-policy-bypass-via-execveat",
          "url": "https://www.vulncheck.com/advisories/sudo-through-1.9-17p2-intercept-policy-bypass-via-execveat"
        }
      ],
      "release_date": "2026-08-29T16:35:33.836000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-08T17:19:41+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:65569"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, disable the ptrace-based intercept mode in the `sudoers` configuration. Add `Defaults !intercept` to `/etc/sudoers` or a file within `/etc/sudoers.d/`. This action may affect advanced `sudo` policy enforcement or logging features that rely on ptrace-based interception. Always validate `sudoers` file changes with `visudo` to prevent system lockout.",
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          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "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"
          },
          "products": [
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            "Red Hat Hardened Images:sudo-0:1.9.17-16.p2.1.hum1@src",
            "Red Hat Hardened Images:sudo-0:1.9.17-16.p2.1.hum1@x86_64",
            "Red Hat Hardened Images:sudo-devel-0:1.9.17-16.p2.1.hum1@aarch64",
            "Red Hat Hardened Images:sudo-devel-0:1.9.17-16.p2.1.hum1@x86_64",
            "Red Hat Hardened Images:sudo-logsrvd-0:1.9.17-16.p2.1.hum1@aarch64",
            "Red Hat Hardened Images:sudo-logsrvd-0:1.9.17-16.p2.1.hum1@x86_64",
            "Red Hat Hardened Images:sudo-python-plugin-0:1.9.17-16.p2.1.hum1@aarch64",
            "Red Hat Hardened Images:sudo-python-plugin-0:1.9.17-16.p2.1.hum1@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "sudo: Sudo: Policy bypass allows unauthorized program execution via execveat"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.



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.