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X.Org — security advisories

12 advisorieslatest 2026-07-09⚡ RSS feed

Tracked X.Org products:

X.Org X11 and Xwayland X11, Xwayland xorg-x11-server Xwayland xorg-server libXfont2

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[UPDATE] [medium] X.Org X11, Xwayland: Multiple vulnerabilities

mediumCVE-2026-33999 CVE-2026-34000 CVE-2026-34001 CVE-2026-34002cert-bund2026-07-09

[UPDATE] [high] Xwayland and X.Org X11: Multiple vulnerabilities allow unspecified attack

highCVE-2025-62229 CVE-2025-62230 CVE-2025-62231cert-bund2026-07-09

[UPDATE] [medium] X.Org X11: Multiple vulnerabilities allow unspecified effects, possibly code execution

mediumCVE-2025-26594 CVE-2025-26595 CVE-2025-26596 CVE-2025-26597cert-bund2026-07-09

[UPDATE] [medium] X.Org X11 and Xwayland: Multiple vulnerabilities

mediumCVE-2025-49175 CVE-2025-49176 CVE-2025-49177 CVE-2025-49178cert-bund2026-07-09

[UPDATE] [medium] X.Org X11 and Xwayland: Multiple vulnerabilities

mediumCVE-2026-50256 CVE-2026-50257 CVE-2026-50258 CVE-2026-50259cert-bund2026-07-09

[NEW] [high] X.Org X11 and Xwayland: Multiple vulnerabilities allow code execution and DoS

highCVE-2026-55999 CVE-2026-56000cert-bund2026-07-09

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

highCVSS 8.5CVE-2026-55999msrc2026-07-02

CVE-2026-56002: libXfont2 PCF Font Parsing Heap Buffer Overflow

highCVSS 8.5CVE-2026-56002msrc2026-07-02

CVE-2026-56000: xorg-x11-server / xwayland GLX contextTags Use-After-Free in CommonMakeCurrent()

unknownCVE-2026-56000msrc2026-07-02

CVE-2026-50259: Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb setmap request via mapwidths indexing

highCVSS 7.8CVE-2026-50259msrc2026-06-09

CVE-2026-50262: Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds read/write in glx changedrawableattributes

mediumCVSS 5.5CVE-2026-50262msrc2026-06-09

CVE-2026-50261: Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()

highCVSS 7.8CVE-2026-50261msrc2026-06-09