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CVE-2023-5380: Invalid Bug ID

A use-after-free flaw was found in the xorg-x11-server. An X server crash may occur in a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode) if the pointer is warped from within a window on one screen to the root window of the other screen and if the original window is destroyed followed by another window being destroyed.

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Related news

Gentoo Linux Security Advisory 202401-30

Gentoo Linux Security Advisory 202401-30 - Multiple vulnerabilities have been discovered in the Xorg Server and XWayland, the worst of which can result in privilege escalation or remote code execution. Versions greater than or equal to 21.1.11 are affected.

Red Hat Security Advisory 2023-7428-01

Red Hat Security Advisory 2023-7428-01 - An update for tigervnc is now available for Red Hat Enterprise Linux 7. Issues addressed include out of bounds write and use-after-free vulnerabilities.

Ubuntu Security Notice USN-6453-1

Ubuntu Security Notice 6453-1 - Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled prepending values to certain properties. An attacker could possibly use this issue to cause the X Server to crash, execute arbitrary code, or escalate privileges. Sri discovered that the X.Org X Server incorrectly handled destroying windows in certain legacy multi-screen setups. An attacker could possibly use this issue to cause the X Server to crash, execute arbitrary code, or escalate privileges.

Debian Security Advisory 5534-1

Debian Linux Security Advisory 5534-1 - Jan-Niklas Sohn discovered several vulnerabilities in the Xorg X server, which may result in privilege escalation if the X server is running privileged.

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