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      "text": "Medium"
    },
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    "csaf_version": "2.0",
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      "text": "TuxCare License Agreement",
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        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "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 Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
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      "contact_details": "https://tuxcare.com/contact/",
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        "url": "https://security.tuxcare.com/csaf/v2/els_os/centos8.5els/vex/2026/cve-2026-4897-els_os-centos8_5els.json"
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      "revision_history": [
        {
          "date": "2026-03-26T15:16:00Z",
          "number": "1",
          "summary": "Initial version"
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        {
          "date": "2026-04-24T16:46:45Z",
          "number": "2",
          "summary": "Official Publication"
        },
        {
          "date": "2026-05-04T16:51:42Z",
          "number": "3",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "3"
    },
    "title": "Security update on CVE-2026-4897"
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-4897",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "known_affected": [
          "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.i686",
          "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els1.i686",
          "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els1.x86_64",
          "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els2.i686",
          "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els2.x86_64",
          "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-4897"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/security/cve/CVE-2026-4897",
          "url": "https://access.redhat.com/security/cve/CVE-2026-4897"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=2451739",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451739"
        }
      ],
      "release_date": "2026-03-26T15:16:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "details": "This flaw is local-only: an authenticated user must invoke the setuid polkit-agent-helper-1 and stream an excessively long stdin to force memory exhaustion, yielding at most a denial of service. It provides no confidentiality or integrity impact, no privilege escalation, and scope is unchanged. Because it cannot be triggered over the network and depends on local shell access, its practical impact in centrally managed servers and cloud VMs is limited, so it can be safely deprioritized.",
          "product_ids": [
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.i686",
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els1.i686",
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els1.x86_64",
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els2.i686",
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els2.x86_64",
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.i686",
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els1.i686",
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els1.x86_64",
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els2.i686",
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.tuxcare.els2.x86_64",
            "CentOS-8.5:polkit-libs-0:0.115-12.el8.5.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ]
    }
  ]
}