ALSA-2026:25902 Important: fence-agents security update

The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or unreachable nodes to be forcibly restarted and removed from the cluster. Security Fixes: python-pyjwt: PyJWT: Authentication bypass due to forged JSON Web Token...

OESA-2026-2681 xorg-x11-server security update

X.Org X11 X server Security Fixes: 'Hi all,\n\nCVEs have been issued now, please see inline below\n\nOn Tue, Jun 02, 2026 at 10:01:46AM +1000, Peter Hutterer wrote:', "=======================================================================\nX.Org Security Advisory: June 2, 2026 \n\nIssues in X.Or...

xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption

A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially...

TencentOS Server 4: xorg-x11-server (TSSA-2026:0294)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0294 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities...

SUSE CVE-2026-50257

A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence. A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection...

RHEL 9 : fence-agents (RHSA-2026:22330)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:22330 advisory. The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or...

RHEL 9 : fence-agents (RHSA-2026:22970)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:22970 advisory. The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or unreachable...

RHEL 8 : fence-agents (RHSA-2026:22135)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:22135 advisory. The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or unreachable...

RHEL 9 : fence-agents (RHSA-2026:22969)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:22969 advisory. The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or unreachable...

RHEL 9 : fence-agents (RHSA-2026:22987)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:22987 advisory. The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or unreachable...

RHEL 8 : fence-agents (RHSA-2026:22134)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:22134 advisory. The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or unreachable...

CVE-2026-50257

A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence. A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection...

CVE-2026-50257

A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence. A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection...

EUVD-2026-34812

A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence. A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection...

CVE-2026-50257

A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence. A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection...

CVE-2026-50257

CVE-2026-50257 affects the X.Org X server and Xwayland, with a use-after-free in miSyncDestroyFence(). A client that sets multiple fence triggers can trigger a use-after-free function pointer call when a second X connection destroys the fence. This could crash the X server or allow privilege esca...

CVE-2026-50257 Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestroyfence()

A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence. A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection...

RHSA-2026:22970 Red Hat Security Advisory: fence-agents security update

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CVE-2026-50257

A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence. A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection...

RockyLinux 10 : fence-agents (RLSA-2026:19138)

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:19138 advisory. pyjwt: PyJWT accepts unknown crit header extensions RFC 7515 ?4.1.11 MUST violation CVE-2026-32597 pyasn1: pyasn1 Vulnerable to Denial of Service via...