CVE-2026-52976 Linux CVE debrief

Who should care

Linux kernel developers, Linux distribution maintainers, and organizations using Linux-based systems should be aware of this vulnerability. They should assess their exposure and apply patches or mitigations as necessary. Security teams and administrators responsible for Linux systems should prioritize patching and monitoring for potential exploitation attempts.

Technical summary

The vulnerability is located in the drm/xe component of the Linux kernel. Specifically, it involves two error handling issues in the xe_exec_queue_create_ioctl() function. The first issue occurs when xe_hw_engine_group_add_exec_queue() fails, causing the error path to skip xe_exec_queue_kill(). This can lead to a dangling pointer if the VM is in preempt fence mode. The second issue arises when xa_alloc() fails after xe_hw_engine_group_add_exec_queue() has succeeded, resulting in the queue being freed while still linked into the hw engine group, causing a use-after-free. The fix involves changing the error path for xe_hw_engine_group_add_exec_queue() failure to jump to kill_exec_queue and adding a del_hw_engine_group label for the xa_alloc() failure path.

Defensive priority

High priority should be given to patching affected Linux kernel versions. Administrators should ensure that Linux systems are updated with the latest kernel patches. Monitoring for potential exploitation attempts and reviewing system logs for suspicious activity related to the drm/xe component is also recommended.

Recommended defensive actions

• Apply kernel patches for CVE-2026-52976
• Review and update Linux kernel versions
• Monitor system logs for suspicious activity
• Assess exposure and prioritize patching
• Implement compensating controls for Linux systems

Evidence notes

The CVE record and NVD detail provide information on the vulnerability. The CVE record was published on 2026-06-24T17:17:08.183Z and modified on 2026-06-28T08:16:27.417Z. The NVD detail provides additional information on the vulnerability, including its CVSS score and vector.

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.