PT-2026-28661 · Unknown+3 · Polkit-Agent-Helper-1+3

Published 2026-01-01 · Updated 2026-04-17 · CVE-2026-4897

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions polkit (affected versions not specified)

Description A flaw exists in polkit where a local user can trigger a denial of service. This occurs 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 for the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-4897

MGASA-2026-0085

OPENSUSE-SU-2026:10453-1

SUSE-SU-2026:1424-1

SUSE-SU-2026:1425-1

SUSE-SU-2026:20969-1

SUSE-SU-2026:21032-1

USN-8173-1

Affected Products

Linuxmint

Ubuntu

Polkit

Polkit-Agent-Helper-1

References · 29

• https://osv.dev/vulnerability/USN-8173-1 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2026-0085 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:21032-1 · Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2026-4897 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/KOQZ5PSNKYLZPW6FHB2MTGHOYDTRJHLV · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10453-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1424-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8173-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-4897 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:20969-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1425-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-4897 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-4897 · Security Note
• https://ubuntu.com/security/CVE-2026-4897 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-4897 · Vendor Advisory