CVE-2026-4897
MEDIUMPolkit: polkit: denial of service via unbounded input processing through standard input
Title source: cnaDescription
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)
Core 2
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-4897
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2451739
https://bugzilla.redhat.com/show_bug.cgi?id=2451739
Scores
CVSS v3
5.5
EPSS
0.0013
EPSS Percentile
3.0%
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