CVE-2026-4897
mediumA flaw was found in polkit.
Vendor / product: Freedesktop — polkit
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.
CVSS
5.5
5.5 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (secalert@redhat.com)
Timeline (UTC)
Published: 2026-03-26 15:16
Modified: 2026-11-05 22:18
NVD status: Modified
Last synced 1 hour ago
Verified against the source API 2026-11-05 22:23 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
freedesktop / polkit all versions
redhat / openshift_container_platform 4.0
redhat / enterprise_linux 6.0, 7.0, 8.0, 9.0, 10.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://access.redhat.com/security/cve/CVE-2026-4897
Vendor advisory: https://bugzilla.redhat.com/show_bug.cgi?id=2451739
References
- https://access.redhat.com/errata/RHSA-2026:59997 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:66287 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-4897 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2451739 secalert@redhat.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-05 22:23 UTC · record ↗