OESA-2026-4261 (CVE-2026-96512)

Vulnerability from osv_openeuler – Published: 2026-10-16 11:58 – Updated: 2026-10-16 11:58 – Source website
VLAI
Summary
sudo security update
Details

Sudo is a program designed to allow a sysadmin to give limited root privileges to users and log root activity. The basic philosophy is to give as few privileges as possible but still allow people to get their work done.

Security Fix(es):

A flaw was found in sudo. When sudoers rules use NOTBEFORE or NOTAFTER time-based access restrictions with timestamps that omit the trailing 'Z' timezone indicator, the time evaluation relies on the TZ environment variable inherited from the calling user. Because sudo is a setuid-root program, an unprivileged local user can set TZ to an extreme timezone offset to shift the authorization window by up to approximately 25 hours, causing expired rules to be treated as valid. This allows the user to execute commands outside the intended time window. Authentication is not bypassed; only the time-based authorization check is affected.(CVE-2026-96512)

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "sudo-1.9.15p5-9.oe2403sp4.aarch64.rpm",
          "sudo-debuginfo-1.9.15p5-9.oe2403sp4.aarch64.rpm",
          "sudo-debugsource-1.9.15p5-9.oe2403sp4.aarch64.rpm",
          "sudo-devel-1.9.15p5-9.oe2403sp4.aarch64.rpm"
        ],
        "noarch": [
          "sudo-help-1.9.15p5-9.oe2403sp4.noarch.rpm"
        ],
        "src": [
          "sudo-1.9.15p5-9.oe2403sp4.src.rpm"
        ],
        "x86_64": [
          "sudo-1.9.15p5-9.oe2403sp4.x86_64.rpm",
          "sudo-debuginfo-1.9.15p5-9.oe2403sp4.x86_64.rpm",
          "sudo-debugsource-1.9.15p5-9.oe2403sp4.x86_64.rpm",
          "sudo-devel-1.9.15p5-9.oe2403sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP4",
        "name": "sudo",
        "purl": "pkg:rpm/openEuler/sudo\u0026distro=openEuler-24.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.15p5-9.oe2403sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Sudo is a program designed to allow a sysadmin to give limited root privileges to users and log root activity.  The basic philosophy is to give as few privileges as possible but still allow people to get their work done.\r\n\r\nSecurity Fix(es):\n\nA flaw was found in sudo. When sudoers rules use NOTBEFORE or NOTAFTER time-based access restrictions with timestamps that omit the trailing \u0026apos;Z\u0026apos; timezone indicator, the time evaluation relies on the TZ environment variable inherited from the calling user. Because sudo is a setuid-root program, an unprivileged local user can set TZ to an extreme timezone offset to shift the authorization window by up to approximately 25 hours, causing expired rules to be treated as valid. This allows the user to execute commands outside the intended time window. Authentication is not bypassed; only the time-based authorization check is affected.(CVE-2026-96512)",
  "id": "OESA-2026-4261",
  "modified": "2026-10-16T11:58:42Z",
  "published": "2026-10-16T11:58:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4261"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-96512"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "sudo security update",
  "upstream": [
    "CVE-2026-96512"
  ]
}



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