How to check if you are exposed to CVE-2021-3560
- Find every Red Hat Polkit system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
- Compare each version with the fixed versions in the vendor advisory below. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
- Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2021-3560.
US federal agencies had to fix this by 2023-06-02. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.
Timeline
- · Added to CISA's Known Exploited Vulnerabilities catalog
- · Fix-by date for US federal agencies, passed 1,248 days ago
Vendor advisories and fixes
Weakness type
More exploited Red Hat vulnerabilities
CISA lists 9 exploited Red Hat vulnerabilities. The closest matches:
- CVE-2021-4034Red Hat Polkit Out-of-Bounds Read and Write VulnerabilityAdded 2022-06-27
- CVE-2015-5287Red Hat Automatic Bug Reporting Tool Privilege Escalation VulnerabilityAdded 2026-08-26
- CVE-2015-3246Red Hat Libuser Race Condition VulnerabilityAdded 2026-08-26
- CVE-2018-14667Red Hat JBoss RichFaces Framework Expression Language Injection VulnerabilityAdded 2023-09-28
- CVE-2010-1428Red Hat JBoss Information Disclosure VulnerabilityAdded 2022-05-25
- CVE-2010-0738Red Hat JBoss Authentication Bypass VulnerabilityAdded 2022-05-25
- CVE-2017-12149Red Hat JBoss Application Server Remote Code Execution VulnerabilityAdded 2021-12-10
- CVE-2010-1871Red Hat Linux JBoss Seam 2 Remote Code Execution VulnerabilityAdded 2021-12-10
Keep going
Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.