CVE-2026-4897 — MEDIUM (5.5)

Vulnerability Description

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 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Freedesktop	Polkit	-
Redhat	Openshift Container Platform	4.0
Redhat	Enterprise Linux	6.0

Related Weaknesses (CWE)

CWE-770

References

https://access.redhat.com/security/cve/CVE-2026-4897Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2451739Issue TrackingVendor Advisory

FAQ

What is CVE-2026-4897?

CVE-2026-4897 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 unbound...

How severe is CVE-2026-4897?

CVE-2026-4897 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-4897?

Check the references section above for vendor advisories and patch information. Affected products include: Freedesktop Polkit, Redhat Openshift Container Platform, Redhat Enterprise Linux.