Vulnerability Report

CVE-2026-4897

Title: polkit Out-of-Memory Denial of Service

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2026-4897.

CWE Category CWE-770

Published Date Mar 26, 2026

Modified Date Apr 21, 2026

Exploit Status Not Found

Score 5.5 CVSS v3.1

Exploit Probability (EPSS)

0.01%

Vulnerability Summary

CVE-2026-4897: 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.

Impacted Vendors

redhat 1

freedesktop 1

Reference Links

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

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

5.5

Attack Vector

LOCAL

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-4897 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

April 21, 2026 MODIFIED

Vulnerability data updated via NVD.

April 21, 2026 MODIFIED

Vulnerability data updated via NVD.

March 30, 2026 MODIFIED

Vulnerability data updated via NVD.

March 26, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector LOCAL

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.