CVE-2026-94285

A flaw was found in libX11. An out-of-bounds read vulnerability in the byte-oriented codeset parser allows a malicious X Window System server to cause a Denial of Service DoS by crashing connected client applications. This issue may also allow the server to access limited memory contents from the...

Astra Linux – Vulnerability in xorg-server, xwayland

A use-after-free flaw was discovered in X.Org and Xwayland. The root cursor is referenced in the X server as a global variable. If a client releases the root cursor, the internal references point to freed memory, resulting in a use-after-free...

Astra Linux – Vulnerability in xorg-server

A vulnerability classified as critical was discovered in X.org Server. The vulnerability affects the GetCountedString function in the xkb/xkb.c file. This vulnerability can lead to a buffer overflow. It is recommended that you apply a patch to address this issue. The identifier associated with th...

Astra Linux – Vulnerability in libx11, libxpm

A vulnerability was discovered in libX11 due to an infinite loop within the PutSubImage function. This flaw allows a local user to consume all available system resources and cause a denial of service condition...

Astra Linux – Vulnerability in xorg-server

A flaw was discovered in xorg-x11-server in versions prior to 21.1.2 and prior to 1.20.14. An out-of-bounds access can occur in the SProcRenderCompositeGlyphs function. The greatest threat posed by this vulnerability is related to data confidentiality and integrity, as well as system availability...

Astra Linux – Vulnerability in Firefox and Thunderbird

When using X11, text selected by the page using the Selection API is erroneously copied into the primary selection, a temporary storage similar to the clipboard. This bug only affects Firefox on X11. Other systems are unaffected. This vulnerability affects Firefox versions earlier than 120, Firef...

X.org: xorg-x11-server: GLX contextTags Use-After-Free in CommonMakeCurrent()

A flaw was found in the X.org X11 server, specifically within the GLX OpenGL Extension to the X Window System dispatch layer. A remote attacker can exploit this vulnerability by sending a series of crafted X11 requests. This can lead to a use-after-free condition, where the server attempts to wri...

Important: Red Hat Security Advisory: xorg-x11-server-Xwayland security update

An update for xorg-x11-server-Xwayland is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Security has rated this update as having a security impact of Important. A Common...

[SECURITY] Fedora 44 Update: libXfont2-2.0.9-1.fc44

X.Org X11 libXfont2 runtime library...

libXfont2: computeProps Property Buffer Heap Buffer Overflow

A heap buffer overflow due to missing size checking in the property buffer when parsing PCF files in libXfont2 ComputeScaledProperties before libXfont2 before 2.0.8 could be used by attackers using authenticated X clients to execute code within the X server...

Important: Red Hat Security Advisory: xorg-x11-server-Xwayland security update

An update for xorg-x11-server-Xwayland is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating...

Amazon Linux 2023 : openssh, openssh-clients, openssh-keycat (ALAS2023-2026-2031)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-2031 advisory. A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie- Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Informatio...

Important: Red Hat Security Advisory: xorg-x11-server security update

An update for xorg-x11-server is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in XKB key types due to unchecked shift levels

A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. The X server has multiple stack buffers sized XkbMaxShiftLevel XkbNumKbdGroups but CheckKeyTypes does not verify or clamp non-canonical key types to XkbMaxShiftLevel. A client can change key types to excessive shift...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free in SyncChangeCounter()

A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter. A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or f...

SUSE CVE-2026-55655

A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack ca...

OPENSUSE-SU-2026:21468-1 Security update for GraphicsMagick

This update for GraphicsMagick fixes the following issue - CVE-2026-61464: Heap Buffer Over-Write in X11 import with crafted window title bsc1271496...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch

A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. A mismatch between the X server and the libXfont2 library's maximum font name length can cause a stack buffer overflow during font alias resolution. The server allocates a 256 byte stack buffer but libXfont2's alias...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: out-of-bounds heap write in DRI2 DRIGetBuffers/DRIGetBuffersWithFormat

An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat. A client that requests multiple DRI2BufferBackLeft attachments and one DRI2BufferFrontLeft can trigger an out-of-bounds heap write. This may be used to crash the server, or for...

xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free information disclosure in CreateSaverWindow()

A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow. A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure...