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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

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