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CVE-2026-4897

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

Published: Mar 26, 2026Updated: Apr 21, 2026 Sources: CVE List NVDCWE-770
5.5MEDIUM
NVD MITRE
EPSS Score
0.1%
Top 96.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-770

Affected Products

Red Hat
commercial·USaka redhat
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat OpenShift Container Platform 4SaaSSaaS Service
Cloud & SaaS / container-orchestration
openshift container platformOn-prem
Operating Systems / linux-distro
freedesktop
oss-projectaka freedesktop.org
polkit
OSS Libraries
and 5 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

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

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