{ "document": { "aggregate_severity": { "text": "Medium" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "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" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/centos6els/vex/2026/cve-2026-4897-els_os-centos6els.json" } ], "tracking": { "current_release_date": "2026-05-14T22:48:26Z", "generator": { "date": "2026-05-14T22:48:26Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-4897-ELS_OS-CENTOS6ELS", "initial_release_date": "2026-03-26T15:16:00Z", "revision_history": [ { "date": "2026-03-26T15:16:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-04-23T08:44:41Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-05-14T16:26:19Z", "number": "3", "summary": "Update document" }, { "date": "2026-05-14T22:48:26Z", "number": "4", "summary": "Update document" } ], "status": "final", "version": "4" }, "title": "Security update on CVE-2026-4897" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Community Enterprise Operating System 6", "product": { "name": "Community Enterprise Operating System 6", "product_id": "CentOS-6", "product_identification_helper": { "cpe": "cpe:2.3:o:centos:centos:6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Community Enterprise Operating System" }, { "branches": [ { "category": "product_version", "name": "polkit-0:0.96-11.el6_10.1.i686", "product": { "name": "polkit-0:0.96-11.el6_10.1.i686", "product_id": "polkit-0:0.96-11.el6_10.1.i686", "product_identification_helper": { "purl": "pkg:rpm/centos/polkit@0.96-11.el6_10.1?arch=i686" } } }, { "category": "product_version", "name": "polkit-devel-0:0.96-11.el6_10.1.i686", "product": { "name": 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"product_identification_helper": { "purl": "pkg:rpm/tuxcare/polkit@0.96-11.el6_10.1.tuxcare.els1?arch=i686" } } } ], "category": "architecture", "name": "i686" }, { "branches": [ { "category": "product_version", "name": "polkit-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "product": { "name": "polkit-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "product_id": "polkit-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/polkit@0.96-11.el6_10.1.tuxcare.els1?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "TuxCare" }, { "branches": [ { "branches": [ { "category": "product_version", "name": "polkit-docs-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "product": { "name": "polkit-docs-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "product_id": "polkit-docs-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "product_identification_helper": { "purl": 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"polkit-desktop-policy-0:0.96-11.el6_10.1.tuxcare.els1.noarch", "product": { "name": "polkit-desktop-policy-0:0.96-11.el6_10.1.tuxcare.els1.noarch", "product_id": "polkit-desktop-policy-0:0.96-11.el6_10.1.tuxcare.els1.noarch", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/polkit-desktop-policy@0.96-11.el6_10.1.tuxcare.els1?arch=noarch" } } } ], "category": "architecture", "name": "noarch" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "polkit-0:0.96-11.el6_10.1.tuxcare.els1.i686 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:polkit-0:0.96-11.el6_10.1.tuxcare.els1.i686" }, "product_reference": "polkit-0:0.96-11.el6_10.1.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "polkit-0:0.96-11.el6_10.1.tuxcare.els1.x86_64 as a component of Community Enterprise 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"product_reference": "polkit-0:0.96-11.el6_10.1.i686", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "polkit-0:0.96-11.el6_10.1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:polkit-0:0.96-11.el6_10.1.x86_64" }, "product_reference": "polkit-0:0.96-11.el6_10.1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "polkit-docs-0:0.96-11.el6_10.1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:polkit-docs-0:0.96-11.el6_10.1.x86_64" }, "product_reference": "polkit-docs-0:0.96-11.el6_10.1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "polkit-devel-0:0.96-11.el6_10.1.i686 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.i686" }, "product_reference": "polkit-devel-0:0.96-11.el6_10.1.i686", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "polkit-devel-0:0.96-11.el6_10.1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.x86_64" }, "product_reference": "polkit-devel-0:0.96-11.el6_10.1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "polkit-desktop-policy-0:0.96-11.el6_10.1.noarch as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:polkit-desktop-policy-0:0.96-11.el6_10.1.noarch" }, "product_reference": "polkit-desktop-policy-0:0.96-11.el6_10.1.noarch", "relates_to_product_reference": "CentOS-6" } ] }, "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-6:polkit-0:0.96-11.el6_10.1.i686", "CentOS-6:polkit-0:0.96-11.el6_10.1.tuxcare.els1.i686", "CentOS-6:polkit-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "CentOS-6:polkit-0:0.96-11.el6_10.1.x86_64", "CentOS-6:polkit-desktop-policy-0:0.96-11.el6_10.1.noarch", "CentOS-6:polkit-desktop-policy-0:0.96-11.el6_10.1.tuxcare.els1.noarch", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.i686", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.tuxcare.els1.i686", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.x86_64", "CentOS-6:polkit-docs-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "CentOS-6:polkit-docs-0:0.96-11.el6_10.1.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", "date": "2026-05-14T21:06:39.784198Z", "details": "Justification: This flaw is strictly local-only and requires an already authenticated user to directly invoke the setuid polkit-agent-helper-1 and stream excessive data via stdin; it cannot be triggered remotely. Its impact is limited to availability (OOM-induced DoS) with no confidentiality or integrity risk, and it does not provide privilege escalation. In centrally managed VM/server environments that rarely rely on interactive polkit authentication and do not permit untrusted local shell access, the practical exploitability and operational risk are low, so this can be safely deprioritized.", "product_ids": [ "CentOS-6:polkit-0:0.96-11.el6_10.1.i686", "CentOS-6:polkit-0:0.96-11.el6_10.1.tuxcare.els1.i686", "CentOS-6:polkit-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "CentOS-6:polkit-0:0.96-11.el6_10.1.x86_64", "CentOS-6:polkit-desktop-policy-0:0.96-11.el6_10.1.noarch", "CentOS-6:polkit-desktop-policy-0:0.96-11.el6_10.1.tuxcare.els1.noarch", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.i686", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.tuxcare.els1.i686", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.x86_64", "CentOS-6:polkit-docs-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "CentOS-6:polkit-docs-0:0.96-11.el6_10.1.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-6:polkit-0:0.96-11.el6_10.1.i686", "CentOS-6:polkit-0:0.96-11.el6_10.1.tuxcare.els1.i686", "CentOS-6:polkit-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "CentOS-6:polkit-0:0.96-11.el6_10.1.x86_64", "CentOS-6:polkit-desktop-policy-0:0.96-11.el6_10.1.noarch", "CentOS-6:polkit-desktop-policy-0:0.96-11.el6_10.1.tuxcare.els1.noarch", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.i686", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.tuxcare.els1.i686", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "CentOS-6:polkit-devel-0:0.96-11.el6_10.1.x86_64", "CentOS-6:polkit-docs-0:0.96-11.el6_10.1.tuxcare.els1.x86_64", "CentOS-6:polkit-docs-0:0.96-11.el6_10.1.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Moderate" } ] } ] }