What’s Vulnerable › Vulnerabilities

CVE-2024-49907: drm/amd/display: Check null pointers before using dc->clk_mgr

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-21 · updated 2026-06-17
• Weakness: CWE-476

Description

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.

Affected products

• Linux kernel: before 5.10.227; from 5.11 before 5.15.168; from 5.16 before 6.1.113; from 6.2 before 6.6.55; from 6.7 before 6.10.14; from 6.11 before 6.11.3 — fixed in 5.10.227, 5.15.168, 6.1.113, 6.10.14, 6.11.3, 6.6.55

How to fix

Upgrade to a fixed version: Linux kernel 5.10.227, 5.15.168, 6.1.113, 6.10.14. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3f7e533c10db3d0158709a99e2129ff63add6bcd
• https://git.kernel.org/stable/c/5ba3fbf75b243b2863a8be9e7c393e003d3b88f3
• https://git.kernel.org/stable/c/8d54001f8dccd56146973f23f3ab2ba037a21251
• https://git.kernel.org/stable/c/95d9e0803e51d5a24276b7643b244c7477daf463
• https://git.kernel.org/stable/c/9641bc4adf8446034e490ed543ae7e9833cfbdf5
• https://git.kernel.org/stable/c/a2773e0a4b79e7a6463abdffaf8cc4f24428ba18
• https://git.kernel.org/stable/c/a545a9403e04c6e17fdc04a26a61d9feebbba106
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
• https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

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