FKIE_CVE-2026-61897

Vulnerability from fkie_nvd - Published: 2026-08-20 15:17 - Updated: 2026-08-20 15:17
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
An Ubuntu-specific patch to AccountsService before 23.13.9-8ubuntu7 only partially drops privileges before launching language helper scripts. It changes the effective UID/GID to the target user but leaves the real UID as 0 (root). A shell spawned by a helper script inherits ruid=0 and may reset its effective UID to root, enabling local privilege escalation.
References
security@ubuntu.comhttps://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/2157985
security@ubuntu.comhttps://ubuntu.com/security/CVE-2026-61897
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "accountsservice",
          "platforms": [
            "Ubuntu 14.04 LTS",
            "Ubuntu 16.04 LTS",
            "Ubuntu 18.04 LTS",
            "Ubuntu 20.04 LTS",
            "Ubuntu 22.04 LTS",
            "Ubuntu 24.04 LTS",
            "Ubuntu 26.04 LTS",
            "Ubuntu 26.10"
          ],
          "product": "accountsservice",
          "vendor": "Canonical",
          "versions": [
            {
              "lessThan": "22.07.5-2ubuntu1.6",
              "status": "affected",
              "version": "22.07.5-2ubuntu1",
              "versionType": "dpkg"
            },
            {
              "lessThan": "23.13.9-2ubuntu6.1",
              "status": "affected",
              "version": "23.13.9-2ubuntu6",
              "versionType": "dpkg"
            },
            {
              "lessThan": "23.13.9-8ubuntu5.2",
              "status": "affected",
              "version": "23.13.9-8ubuntu5",
              "versionType": "dpkg"
            },
            {
              "lessThan": "23.13.9-8ubuntu7",
              "status": "affected",
              "version": "23.13.9-8ubuntu6",
              "versionType": "dpkg"
            }
          ]
        }
      ],
      "source": "security@ubuntu.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An Ubuntu-specific patch to AccountsService before 23.13.9-8ubuntu7 only partially drops privileges before launching language helper scripts. It changes the effective UID/GID to the target user but leaves the real UID as 0 (root). A shell spawned by a helper script inherits ruid=0 and may reset its effective UID to root, enabling local privilege escalation."
    }
  ],
  "id": "CVE-2026-61897",
  "lastModified": "2026-08-20T15:17:38.740",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "security@ubuntu.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-20T15:17:38.740",
  "references": [
    {
      "source": "security@ubuntu.com",
      "url": "https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/2157985"
    },
    {
      "source": "security@ubuntu.com",
      "url": "https://ubuntu.com/security/CVE-2026-61897"
    }
  ],
  "sourceIdentifier": "security@ubuntu.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-273"
        }
      ],
      "source": "security@ubuntu.com",
      "type": "Secondary"
    }
  ]
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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