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Vulnerabilities CVE-2026-4897

CVE-2026-4897

Medium
Open
TLP:CLEAR

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

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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.

Details

CVSS Score
5.5
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Mar 26, 2026
Last Modified
Aug 21, 2026
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