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redhatcveRedhat.comRH:CVE-2024-35952
HistoryMay 20, 2024 - 5:43 p.m.

CVE-2024-35952

2024-05-2017:43:06
redhat.com
access.redhat.com
24
linux kernel
vulnerability
cve-2024-35952
drm/ast
soft lockup
infinite-loop
ast_dp_set_on_off
vga driver
dp
link training

AI Score

6.4

Confidence

Low

EPSS

0

Percentile

15.5%

In the Linux kernel, the following vulnerability has been resolved: drm/ast: Fix soft lockup There is a while-loop in ast_dp_set_on_off() that could lead to infinite-loop. This is because the register, VGACRI-Dx, checked in this API is a scratch register actually controlled by a MCU, named DPMCU, in BMC. These scratch registers are protected by scu-lock. If suc-lock is not off, DPMCU can not update these registers and then host will have soft lockup due to never updated status. DPMCU is used to control DP and relative registers to handshake with host’s VGA driver. Even the most time-consuming task, DP’s link training, is less than 100ms. 200ms should be enough.