CVE-2026-93205 Linux CVE debrief

Who should care

Defenders responsible for Linux kernel systems, especially those utilizing the affected versions, should assess exposure and prioritize patching to prevent potential use-after-free issues. This includes verifying patch application, reviewing Linux kernel versions for exposure, and monitoring system logs for suspicious activity. Security teams and vulnerability management teams should also prioritize patching and review compensating controls for exposed

Why it matters

Defenders should prioritize verifying and applying patches for this Linux kernel vulnerability to prevent potential use-after-free issues. The vulnerability affects the iommu/arm-smmu-v3 component, and its resolution ensures correct teardown management during device removal.

• Verify patch application to prevent potential use-after-free
• Assess Linux kernel versions for exposure
• Monitor system logs for suspicious activity

Technical summary

The Linux kernel vulnerability CVE-2026-93205 has been resolved, addressing an issue with the iommu/arm-smmu-v3 component where improper teardown management could lead to use-after-free. The vulnerability was introduced due to the incorrect order of cleanup during the device removal process. This issue has been fixed by managing the teardown with devm to ensure the correct unwind order, preventing accessing the IOPF queue after it has been freed. Defenders should prioritize verifying and applying patches for this Linux kernel vulnerability, especially for systems utilizing the affected Linux kernel versions.

Defensive priority

Defenders should prioritize verifying and applying patches for this vulnerability, especially for systems utilizing the affected Linux kernel versions.

Recommended defensive actions

• Verify and apply patches for this vulnerability
• Review Linux kernel versions for potential exposure
• Monitor system logs for suspicious activity
• Assess Linux kernel systems for exposure
• Prioritize patching for Linux kernel systems
• Review compensating controls for exposed systems
• Track exceptions and retest remediated assets

Evidence notes

The CVE record and source metadata indicate that this vulnerability has been resolved in the Linux kernel. The official CVE Program record and NVD vulnerability detail provide additional context. Defenders should verify patch application and assess exposure to ensure correct teardown management during device removal, preventing potential use-after-free issues. This involves reviewing Linux kernel versions, monitoring system logs for suspicious activity, and applying patches for this vulnerability.

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.