Display Vulnerability in Linux Kernel Affecting AMD Graphics

CVE-2023-53258

What is CVE-2023-53258?

A vulnerability in the Linux kernel affects AMD display systems by creating an underflow condition when utilizing displays with a large vblank region combined with a low refresh rate. This issue arises from the complex calculations involved in managing vblank intervals. The vulnerability has been addressed by simplifying these calculations and increasing the default value for VBlankNomDefaultUS to 800 microseconds, enhancing the stability and security of display operations.

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