CVE-2024-49916 drm/amd/display: Add NULL check for clk_mgr and clk_mgr->funcs in dcn401_init_hw

What is CVE-2024-49916?

CVE-2024-49916 is a medium-severity vulnerability in Linux kernel, published on 21 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

drm/amd/display: Add NULL check for clk_mgr and clk_mgr->funcs in dcn401_init_hw

This commit addresses a potential null pointer dereference issue in the `dcn401_init_hw` function. The issue could occur when `dc->clk_mgr` or `dc->clk_mgr->funcs` is null.

The fix adds a check to ensure `dc->clk_mgr` and `dc->clk_mgr->funcs` is not null before accessing its functions. This prevents a potential null pointer dereference.

Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn401/dcn401_hwseq.c:416 dcn401_init_hw() error: we previously assumed 'dc->clk_mgr' could be null (see line 225)

Weakness: CWE-476

Which versions are affected by CVE-2024-49916?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-49916?

Apply the vendor's patch.

Is CVE-2024-49916 being exploited?

There is no known exploitation of CVE-2024-49916 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-51102, AZL-51186, BELL-CVE-2024-49916, DEBIAN-CVE-2024-49916, GHSA-rqg9-48mq-4pm8, ROOT-OS-DEBIAN-11-CVE-2024-49916 and 4 more.