Medium 5.5Published Mar 26, 2026

CVE-2026-4897A flaw was found in polkit.

Updated under an hour ago (2026-10-19 08:50 UTC)

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It affects freedesktop polkit and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for freedesktop polkit

Exploited in the last 30 days

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 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Sep 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

freedesktop polkit freedesktop:polkit	all versions	NVD
redhat openshift_container_platform redhat:openshift_container_platform	4.0	NVD
redhat enterprise_linux redhat:enterprise_linux	6.0; 7.0; 8.0; 9.0; 10.0	NVD

References

https://access.redhat.com/errata/RHSA-2026:59997
https://access.redhat.com/errata/RHSA-2026:66287
https://access.redhat.com/security/cve/CVE-2026-4897vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2451739issue-tracking, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.