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X.Org X.Org ServerX.Org Server SyncAwaitFence Use-After-Free Privilege Escalation Vulnerability

Risk 49
First published (updated )
Advisory
ZDI-26-335

X.Org X.Org ServerZDI-26-335: X.Org Server SyncAwaitFence Use-After-Free Privilege Escalation Vulnerability

Risk 49
First published (updated )
ZDI-CAN-28706

X.Org X.Org ServerZDI-26-336: X.Org Server CheckKeyActions Out-Of-Bounds Read Information Disclosure Vulnerability

Risk 26
First published (updated )
ZDI-CAN-28737

X.Org X.Org ServerX.Org Server CheckKeyActions Out-Of-Bounds Read Information Disclosure Vulnerability

Risk 26
First published (updated )
Advisory
ZDI-26-336

X.Org X.Org ServerX.Org Server CheckSetGeom Out-Of-Bounds Read Information Disclosure Vulnerability

Risk 24
First published (updated )
Advisory
ZDI-26-334
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X.Org X.Org ServerZDI-26-334: X.Org Server CheckSetGeom Out-Of-Bounds Read Information Disclosure Vulnerability

Risk 24
First published (updated )
ZDI-CAN-28679

X.Org X.Org ServerX.Org Server XkbSetCompatMap Integer Underflow Privilege Escalation Vulnerability

Risk 48
First published (updated )
Advisory
ZDI-26-333

X.Org X.Org ServerZDI-26-333: X.Org Server XkbSetCompatMap Integer Underflow Privilege Escalation Vulnerability

Risk 46
First published (updated )
ZDI-CAN-28593

X.Org X.Org X ServerX.Org Server CheckKeyTypes Buffer Overflow Privilege Escalation Vulnerability

Risk 46
First published (updated )
Advisory
ZDI-26-337

redhat Enterprise LinuxXorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()

Risk 34
Severity
5.5
First published (updated )
CVE-2026-50263
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X.Org xorg-x11-serverXorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds read/write in glx changedrawableattributes

Risk 34
Severity
5.5
First published (updated )
CVE-2026-50262

X.Org xorg-x11-serverXorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds heap write in dri2 drigetbuffers/drigetbufferswithformat

Risk 73
Severity
7.8
First published (updated )
CVE-2026-50264

X.Org xorg-serverXorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()

Risk 74
Severity
7.8
First published (updated )
CVE-2026-50261

X.Org xorg-serverUse After Free

Risk 19
Severity
4
First published (updated )
REDHAT-BUG-2485388

X.Org xorg-x11-serverA wrong size validation check in __glXDisp_ChangeDrawableAttributes() can read (or write) a client-c…

Risk 19
Severity
4
First published (updated )
REDHAT-BUG-2485387
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X.Org xorg-x11-serverUse After Free

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2485386

redhat Enterprise LinuxXorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb setmap request via mapwidths indexing

Risk 74
Severity
7.8
First published (updated )
CVE-2026-50259

redhat Enterprise LinuxXorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestroyfence()

Risk 74
Severity
7.8
First published (updated )
CVE-2026-50257

redhat Enterprise LinuxXorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in freecounter()

Risk 74
Severity
7.8
First published (updated )
CVE-2026-50260

redhat Enterprise LinuxXorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb key types due to unchecked shift levels

Risk 74
Severity
7.8
First published (updated )
CVE-2026-50258
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X.Org xorg-x11-serverBuffer Overflow

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2485384

X.Org xorg-x11-serverUse After Free

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2485382

X.Org xorg-serverThe X server has multiple stack buffers sized XkbMaxShiftLevel * XkbNumKbdGroups but CheckKeyTypes()…

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2485383

X.Org xorg-x11-serverUse After Free

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2485385

redhat Enterprise LinuxXorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libxfont2 name length mismatch

Risk 74
Severity
7.8
First published (updated )
CVE-2026-50256
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oss-secFW: X.Org Security Advisory: multiple security issues X.Org X server and Xwayland

First published (updated )
https://seclists.org/oss-sec/2026/q2/821

oss-secFW: X.Org Security Advisory: multiple security issues X.Org X server and Xwayland

First published (updated )
https://seclists.org/oss-sec/2026/q2/775

X.Org xorg-x11-server-XwaylandImportant: xorg-x11-server-Xwayland security update

Risk 40
First published (updated )
Advisory
RHSA-2026:20562

X.Org X.Org X server (Xwayland)Important: xorg-x11-server-Xwayland security update

Risk 40
First published (updated )
Advisory
RHSA-2026:20561

X.Org X.Org X server (Xwayland)Important: xorg-x11-server-Xwayland security update

Risk 40
First published (updated )
Advisory
RHSA-2026:20563
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