CVE-2024-35952

drm/ast: Fix soft lockup

Description

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.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/8a6fea3fcb577a543ef67683ca7105bde49a38fb
https://git.kernel.org/stable/c/a81b2acd43e24e419f65df97348c76a5a1496066
https://git.kernel.org/stable/c/35768baf0fdfc47ede42d899506bad78450e9294
https://git.kernel.org/stable/c/bc004f5038220b1891ef4107134ccae44be55109

Frequently Asked Questions

What is the severity of CVE-2024-35952?: CVE-2024-35952 has not yet been assigned a CVSS score.
How to fix CVE-2024-35952?: To fix CVE-2024-35952, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-35952 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2024-35952 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-35952?: CVE-2024-35952 affects Linux Linux, Linux Linux.

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