CVEvulnerability

CVE-2024-35952

5.5 MEDIUM Published 2024-05-20 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2024-05-20
Last modified
2026-06-17
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-667

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.

Affected configurations

• linux linux kernel (>= 5.19 < 6.1.87) • linux linux kernel (>= 6.2 < 6.6.28) • linux linux kernel (>= 6.7 < 6.8.7) • linux linux kernel 6.9

Related

Weakness · CWE (1)

  • CWE-667 Improper Locking weakness

References