CVE-2026-72075 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution vendors, and users of Linux-based systems, especially those using the ims-pcu module, should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The ims_pcu_reset_device sysfs callback in the Linux kernel does not acquire the pcu->cmd_mutex before calling ims_pcu_execute_command, leading to a potential race condition vulnerability. This vulnerability could result in data races and corruption of the shared command buffer if triggered concurrently with other commands. The ims_pcu_reset_device callback calls ims_pcu_execute_command without acquiring the pcu->cmd_mutex, leading to potential data races and corruption of the shared command buffer. Acquiring the pcu->cmd_mutex before calling ims_pcu_execute_command can prevent data races and corruption of the shared command buffer.

Defensive priority

Medium

Recommended defensive actions

• Verify and apply the patch to acquire pcu->cmd_mutex before calling ims_pcu_execute_command
• Review and update Linux kernel configurations to ensure the ims-pcu module is properly configured
• Monitor system logs for potential data races and corruption of the shared command buffer
• Perform a thorough review of the Linux kernel code to identify potential similar vulnerabilities
• Implement compensating controls for exposed systems while remediation is scheduled and verified
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Review relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further analysis and verification are needed to fully understand the issue. The ims_pcu_reset_device sysfs callback in the Linux kernel does not acquire the pcu->cmd_mutex before calling ims_pcu_execute_command, potentially leading to data races and corruption of the shared command buffer. Defenders should verify patch application, review Linux kernel configurations, and monitor system logs for potential issues.

Official resources