ACTIVELY EXPLOITED
CVE-2021-4034: Red Hat Polkit Out-of-Bounds Read and Write Vulnerability
| Vendor | Red Hat |
|---|---|
| Product | Polkit |
| Actively exploited | Yes |
| Added to CISA KEV | 27 Jun 2022 |
| CISA federal deadline | 18 Jul 2022 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-787 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
The Red Hat polkit pkexec utility contains an out-of-bounds read and write vulnerability that allows for privilege escalation with administrative rights.
SOURCES
Other Red Hat flaws
- CVE-2015-5287: Red Hat Automatic Bug Reporting Tool Privilege Escalation Vulnerability
- CVE-2015-3246: Red Hat Libuser Race Condition Vulnerability
- CVE-2018-14667: Red Hat JBoss RichFaces Framework Expression Language Injection Vulnerability
- CVE-2021-3560: Red Hat Polkit Incorrect Authorization Vulnerability
- CVE-2010-1428: Red Hat JBoss Information Disclosure Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.