CVE-2026-53115 Linux CVE debrief

Who should care

Linux kernel maintainers, users, and administrators should assess exposure and prioritize patching or mitigation due to the high CVSS score and public disclosure of this vulnerability.

Why it matters

This vulnerability has a high CVSS score of 7.8 and has been publicly disclosed. Linux kernel maintainers and users should assess exposure and prioritize patching or mitigation to prevent potential use-after-free conditions.

• Verify Linux kernel versions and assess exposure
• Prioritize patching or mitigation for affected versions
• Monitor Linux kernel updates and security advisories

Technical summary

The Linux kernel's fsl-mc bus driver has a use-after-free vulnerability. When a driver is probed through __driver_attach(), the bus' match() callback accesses the driver_override field without a lock, potentially causing a use-after-free condition. The issue is resolved by using the driver-core driver_override infrastructure, which handles proper locking internally. Linux kernel maintainers and users should assess exposure and prioritize patching or mitigation, as this vulnerability has been publicly disclosed and has a high CVSS score of 7.8. Affected product deployments should be identified in managed environments, and owners should be assigned for follow-up.

Defensive priority

Linux kernel maintainers and users should assess exposure and prioritize patching or mitigation, as this vulnerability has been publicly disclosed and has a high CVSS score of 7.8.

Recommended defensive actions

• Review and apply patches for affected Linux kernel versions
• Assess exposure and prioritize patching or mitigation
• Monitor Linux kernel updates and security advisories
• Verify Linux kernel versions and assess exposure
• Prioritize patching or mitigation for affected versions
• 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

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score and affected kernel versions. Multiple patch references are provided, indicating fixes for various kernel versions.

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.