CVE-2026-53145 Linux CVE debrief

Who should care

Linux kernel users, administrators, and developers should be aware of this vulnerability and take necessary defensive actions. The vulnerability has a high CVSS score, indicating a significant risk. Affected systems may be vulnerable to attacks, and users should prioritize patching and mitigation.

Technical summary

The CVE-2026-53145 vulnerability is caused by a race condition between the gem_close and gem_change_handle ioctls in the Linux kernel's drm/gem component. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. To address this issue, several code changes were made, including renaming a local variable, merging the gem obj lookup with the two-stage idr_replace, and adjusting error paths. However, the ioctl has been disabled until further issues are resolved. The vulnerability can be mitigated by patching the affected systems and taking necessary defensive actions.

Defensive priority

High priority should be given to patching and mitigating this vulnerability. Linux kernel users and administrators should take necessary actions to protect their systems.

Recommended defensive actions

• Patch the affected Linux kernel systems
• Review and update system configurations
• Monitor system logs for suspicious activity
• Implement additional security measures, such as access controls and intrusion detection
• Consider disabling the ioctl until further issues are resolved

Evidence notes

The CVE-2026-53145 vulnerability was published on June 25, 2026, and modified on June 28, 2026. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. The vulnerability is caused by a race condition between the gem_close and gem_change_handle ioctls in the Linux kernel's drm/gem component. Several code changes were made to address this issue, but the ioctl has been disabled until further issues are resolved.

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.