CVE-2021-47362 - CVE House
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Status published Medium CVE-2021-47362

drm/amd/pm: Update intermediate power state for SI

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/pm: Update intermediate power state for SI Update the current state as boot state during dpm initialization. During the subsequent initialization, set_power_state gets called to transition to the final power state. set_power_state refers to values from the current state and without current state populated, it could result in NULL pointer dereference. For ex: on platforms where PCI speed change is supported through ACPI ATCS method, the link speed of current state needs to be queried before deciding on changing to final power state's link speed. The logic to query ATCS-support was broken on certain platforms. The issue became visible when broken ATCS-support logic got fixed with commit f9b7f3703ff9 ("drm/amdgpu/acpi: make ATPX/ATCS structures global (v2)"). Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1698

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
2ab4d0e74256fc49b7b270f63c1d1e47c2455abc, 2c83e77a3e35dc91350cea077d1aaefdc0a61297, 46cb720a8a3ece894eff4e1b85b3925efb71afd2, 65c96da9c684946d0874bf911fdb50a3b497cb30, 4.9.131, 4.14.74, 4.18.12, 4.19, 0, 5.10.70, 5.14.9, 5.15

Timeline

Official Publish: May 21st, 2024
Last Modified: May 23rd, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.