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Xwayland

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high threat

CVE-2026-55999 xorg-server / xwayland glamor font atlas Heap Buffer Overflow

A heap buffer overflow vulnerability, identified as CVE-2026-55999, has been discovered in the xorg-server and xwayland components, specifically within the glamor font atlas functionality, affecting systems using these display servers and potentially leading to arbitrary code execution or denial of service.

exploited xorg-server +1 cve vulnerability heap-overflow linux xorg xwayland
1c
high advisory

X.Org X11 and Xwayland Multiple Vulnerabilities Allowing Code Execution and DoS

Multiple vulnerabilities in X.Org X11 and Xwayland allow an attacker to cause a denial of service or potentially execute arbitrary program code, posing a significant risk to systems utilizing these display server implementations, potentially leading to system instability or full compromise.

X.Org X11 +1 vulnerability linux x.org x11 xwayland denial-of-service code-execution
2t
high advisory

Multiple Vulnerabilities in X.Org X11 and Xwayland

Multiple vulnerabilities exist in X.Org X11 and Xwayland, allowing attackers to disclose information, escalate privileges, conduct denial-of-service attacks, and perform unspecified attacks.

X11 +1 xorg xwayland privilege-escalation information-disclosure denial-of-service
2r 5t
medium advisory

X.Org X11 and Xwayland Multiple Vulnerabilities

A local attacker can exploit vulnerabilities in X.Org X11 and Xwayland to perform unspecified attacks, including memory corruption, information disclosure, or a denial-of-service condition.

X.Org X11 +1 privilege-escalation information-gathering denial-of-service linux
2r 3t