CVE-2026-74450 Linux CVE debrief

Who should care

Linux kernel developers and users, amd gpu users, and others who rely on the Linux kernel for their operations, including cloud providers, operating system distributors, and end-users of Linux-based systems. These individuals and organizations should be aware of the vulnerability and take necessary steps to mitigate its effects. This includes reviewing and applying patches, monitoring for suspicious activity, and implementing compensating controls where necessary. The vulnerability's impact on these groups is significant, as it can lead to system crashes, data corruption, and potentially even code execution. Therefore, it is essential for these groups to prioritize patching and mitigation efforts to minimize the risk associated with this vulnerability. Additionally, security teams and vulnerability management teams should also be aware of this vulnerability and prioritize it accordingly in their risk management processes. The vulnerability's severity and potential impact make it essential for all relevant stakeholders to take immediate action to address it. This includes verifying the presence of affected systems, applying patches, and monitoring for potential exploitation attempts. By taking proactive steps, these groups can minimize the risk associated with this vulnerability and ensure the security and stability of their systems. The Linux kernel community, in particular, should review the patch and apply it to their systems to prevent exploitation. Similarly, Linux distribution maintainers should prioritize patching and update their packages to ensure that users are protected. End-users of Linux-based systems should also be aware of the vulnerability and take necessary steps to mitigate its effects, such as applying patches or seeking guidance from their Linux distribution or system administrators. Overall, the vulnerability affects a wide range of stakeholders, and it is essential for all of them to take proactive steps to address it. The impact of the vulnerability can be significant, and it is crucial for all relevant groups to prioritize patching and mitigation efforts to minimize the risk associated with it. By doing so, they can ensure the security and

Technical summary

The Linux kernel has a use-after-free vulnerability in the drm/amd/pm component. The amdgpu_dpm_get_pp_table() function returns a pointer to a driver-owned power table after dropping adev->pm.mutex. A concurrent pp_table write can replace and free the allocation during the copy, causing a use-after-free. The fix changes the DPM interface to copy into caller-provided storage while the mutex is held.

Defensive priority

High

Recommended defensive actions

• Apply the official patch to update the DPM interface
• Restrict access to the affected component
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability is caused by a use-after-free in the drm/amd/pm component of the Linux kernel. The amdgpu_dpm_get_pp_table() function returns a pointer to a driver-owned power table after dropping adev->pm.mutex. A concurrent pp_table write can replace and free the allocation during the copy, causing a use-after-free. The fix changes the DPM interface to copy into caller-provided storage while the mutex is held.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.