发布于3月6日3月6日 Members Red Hat: CVE-2024-35952: kernel: drm/ast: Fix soft lockup (Multiple Advisories) Severity 5 CVSS (AV:L/AC:L/Au:S/C:N/I:N/A:C) Published 05/20/2024 Created 08/13/2024 Added 08/12/2024 Modified 12/05/2024 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. Solution(s) redhat-upgrade-kernel redhat-upgrade-kernel-rt References CVE-2024-35952 RHSA-2024:5101 RHSA-2024:5102 RHSA-2024:9315
