{"id":"CVE-2026-4897","title":"A flaw was found in polkit","summary":"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…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"freedesktop","product":"polkit","affected":["polkit","openshift_container_platform = 4.0","enterprise_linux = 6.0","enterprise_linux = 7.0","enterprise_linux = 8.0","enterprise_linux = 9.0","enterprise_linux = 10.0"],"published":"2026-03-26","updated":"2026-09-10","sourceUpdated":"2026-09-10T18:18:01.857","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-4897","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:59997","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:66287","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-4897","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451739","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4897.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-4897"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4897"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-03-28T02:23:56.266925Z"},"epss":0.00153,"epssPercentile":0.0482,"ingestedAt":"2026-08-21T14:17:57.487Z","patched":["enterprise_linux_appstream_v_10","enterprise_linux_baseos_v_10","hardened_images"],"slug":"CVE-2026-4897","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `polkit`\n- `openshift_container_platform = 4.0`\n- `enterprise_linux = 6.0`\n- `enterprise_linux = 7.0`\n- `enterprise_linux = 8.0`\n- `enterprise_linux = 9.0`\n- `enterprise_linux = 10.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:59997** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:59997)\n- **RHSA-2026:66287** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66287)\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4, … · updated 2026-09-10 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4897.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}