CVE-2026-4897

MEDIUM

Polkit: polkit: denial of service via unbounded input processing through standard input

Title source: cna

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.

References (2)

[Vdb Entry, X_Refsource_Redhat] https://access.redhat.com/security/cve/CVE-2026-4897

[Issue Tracking, X_Refsource_Redhat] https://bugzilla.redhat.com/show_bug.cgi?id=2451739

Scores

CVSS v3 5.5

EPSS 0.0001

EPSS Percentile 0.5%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-770

Status published

Products (13)

freedesktop/polkit

Red Hat/Red Hat Enterprise Linux 10

Red Hat/Red Hat Enterprise Linux 6

Red Hat/Red Hat Enterprise Linux 7

Red Hat/Red Hat Enterprise Linux 8

Red Hat/Red Hat Enterprise Linux 9

Red Hat/Red Hat OpenShift Container Platform 4

redhat/enterprise_linux 6.0

redhat/enterprise_linux 7.0

redhat/enterprise_linux 8.0

... and 3 more

Published Mar 26, 2026

Tracked Since Mar 26, 2026