Red Hat Polkit
YES - ON THE CISA KEV LIST
CVE-2021-4034
Red Hat Polkit Out-of-Bounds Read and Write Vulnerability
overdue since 2022-07-18
Red Hat: 9 entries (0.5% of all KEV entries are from this vendor); 2 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
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.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-4034
References
Other KEV entries for this vendor: Red Hat
- CVE-2015-3246 - Libuser (2026-08-26)
- CVE-2015-5287 - Automatic Bug Reporting Tool (2026-08-26)
- CVE-2018-14667 - JBoss RichFaces Framework (2023-09-28)
- CVE-2021-3560 - Polkit (2023-05-12)
- CVE-2010-1428 - JBoss (2022-05-25)
- CVE-2010-0738 - JBoss (2022-05-25)
- CVE-2017-12149 - JBoss Application Server (2021-12-10)
- CVE-2010-1871 - JBoss Seam 2 (2021-12-10)
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