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.

Score

CVSS 3.1 5.5 Medium

Status

Modified - secalert@redhat.com

Published

2026-03-26

Last modified

2026-09-10

Weaknesses

CWE-770

Affected products

• Polkit (Freedesktop)
• Enterprise Linux (Redhat)
• Hummingbird (Redhat)
• Openshift (Redhat)
• Openshift Container Platform (Redhat)

References

• https://access.redhat.com/errata/RHSA-2026:59997
• https://access.redhat.com/errata/RHSA-2026:66287
• https://access.redhat.com/security/cve/CVE-2026-4897
• https://bugzilla.redhat.com/show_bug.cgi?id=2451739