CVE-2024-49907

MEDIUM5.5

drm/amd/display: Check null pointers before using dc->clk_mgr

Published Oct 21, 2024

Modified 2 months ago

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Check null pointers before using dc->clk_mgr

[WHY & HOW] dc->clk_mgr is null checked previously in the same function, indicating it might be null.

Passing "dc" to "dc->hwss.apply_idle_power_optimizations", which dereferences null "dc->clk_mgr". (The function pointer resolves to "dcn35_apply_idle_power_optimizations".)

This fixes 1 FORWARD_NULL issue reported by Coverity.

References

WEBhttps://git.kernel.org/stable/c/3f7e533c10db3d0158709a99e2129ff63add6bcd WEBhttps://git.kernel.org/stable/c/5ba3fbf75b243b2863a8be9e7c393e003d3b88f3 WEBhttps://git.kernel.org/stable/c/8d54001f8dccd56146973f23f3ab2ba037a21251 WEBhttps://git.kernel.org/stable/c/95d9e0803e51d5a24276b7643b244c7477daf463 WEBhttps://git.kernel.org/stable/c/9641bc4adf8446034e490ed543ae7e9833cfbdf5 WEBhttps://git.kernel.org/stable/c/a2773e0a4b79e7a6463abdffaf8cc4f24428ba18 WEBhttps://git.kernel.org/stable/c/a545a9403e04c6e17fdc04a26a61d9feebbba106 WEBhttps://lists.debian.org/debian-lts-announce/2025/01/msg00001.html WEBhttps://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2024-49907

CVSS Analysis

CVSS v3.1

5.5

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

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

Ecosystems

Timeline

PublishedOct 21, 2024

ModifiedNov 3, 2025