CVE-2026-4897
5.5
MEDIUM
CVSS 3.1
EPSS 0.01%
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.
How to fix CVE-2026-4897
To remediate CVE-2026-4897, upgrade the affected package to a fixed version below.
- Debian/policykit-1—upgrade to 0.105-31+deb11u2 or later
Is CVE-2026-4897 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.105-31+deb11u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |