Linuxsecurity Critical CVEs Affect Fedora Xwayland and X.Org X11 Server
Article Content
- •Critical CVEs fixed in Fedora 43 Xwayland and Fedora 42 X.Org X11 server.
- •Vulnerabilities include CVE-2026-33999, CVE-2026-34000, CVE-2026-34001, CVE-2026-34002, CVE-2026-34003.
- •Users are urged to update their systems using the 'dnf' package manager.
On April 14, 2026, critical updates were released for Fedora 43's Xwayland and Fedora 42's X.Org X11 server, addressing multiple vulnerabilities. The updates include fixes for CVE-2026-33999, CVE-2026-34000, CVE-2026-34001, CVE-2026-34002, and CVE-2026-34003, all published on April 23, 2026. These vulnerabilities could potentially allow attackers to exploit the X server environments, affecting users running Fedora distributions. The updates can be installed using the 'dnf' package manager. Security professionals are advised to apply these updates promptly to mitigate risks associated with these vulnerabilities. The affected software versions include Xwayland 24.1.10 and xserver 21.1.22. The scope of impact includes all users of the affected Fedora versions. Current status indicates that the vulnerabilities are patched, but users must ensure they update their systems.
Ask AI about this cluster
Answers cite the sources they use
Timeline
More articles in this cluster (3)
Following this threat?
Track Fedora and CVE-2026-33999 in your own feed — you're alerted when they show up in new reporting, leak sites or exploitation.
Free account · no card needed
Continue Reading
Critical Vulnerabilities in X.Org X Server Lead to Potential DoS and Privilege Escalation Debian has issued urgent advisories for vulnerabilities in the X.Org X server affecting versions 20.11 to 21.1.16. The vulnerabilities include CVE-2022-49737, a race condition, and CVE-2026-33999, an integer underflow, both allowing for potential denial of service (DoS) or privilege escalation. Additionally… 
Critical Cisco FMC Vulnerabilities Under Active Exploitation Cisco's Secure Firewall Management Center (FMC) Software has two critical vulnerabilities, CVE-2026-20079 and CVE-2026-20316, that are currently being exploited by state-sponsored and ransomware actors. CVE-2026-20079, rated 10.0 on the CVSS scale, allows unauthenticated remote attackers to bypass authentication and…