CVE-2026-4897
Polkit: polkit: denial of service via unbounded input processing through standard input
- State
- Published
- Severity
- 5.5 Medium
- Published
- Mar 26, 2026
- Updated
- Sep 10, 2026
- Reserved
- Mar 26, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
Red Hat Enterprise Linux 10Red Hat |
|
Red Hat Hardened ImagesRed Hat |
|
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat |
References
- RHSA-2026:59997vendor-advisory
- RHSA-2026:66287vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-4897vdb-entry
- RHBZ#2451739issue-tracking
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