Home › Exploited CVEs › CVE-2021-4034
CVE-2021-4034: Red Hat Polkit Out-of-Bounds Read and Write Vulnerability
Red Hat Polkit · in CISA KEV since 2022-06-27
2022-06-27added to KEV
2022-07-18federal remediation due date
94.92%EPSS exploit probability (30 days) 99.9th percentile
7.8 HIGHCVSS 3.1
Knownknown ransomware use
150days from NVD publication to KEV
What it is
The Red Hat polkit pkexec utility contains an out-of-bounds read and write vulnerability that allows for privilege escalation with administrative rights.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-787 |
|---|---|
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2022-01-28 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-4034.json · all KEV CVEs
Kevscope: daily CISA KEV + EPSS datasetThe whole KEV catalog joined with daily EPSS and CVSS scores as CSV/Parquet, refreshed daily. Free to download.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.