CVE-2026-58766 Google CVE debrief

Who should care

Defenders responsible for Google Android systems, specifically those running affected versions, should assess exposure and prioritize patching. This includes reviewing and updating affected systems, monitoring system logs for potential exploitation attempts, and verifying patch application to prevent potential exploitation. Additionally, defenders should track exceptions, retest remediated assets, and close the item only after evidence is documented.

Why it matters

CVE-2026-58766 is a high-severity vulnerability in arm-smmu-v3.c functions, potentially allowing local escalation of privilege. Defenders responsible for Google Android systems should assess exposure and prioritize patching.

• Verification of patch application is required to prevent potential exploitation.
• Defenders should assess exposure of Google Android systems to this vulnerability.
• Local escalation of privilege could lead to increased access and control over affected systems.

Technical summary

A logic error in the arm-smmu-v3.c functions could lead to local escalation of privilege with no additional execution privileges needed. The vulnerability has a CVSS score of 7.8 and severity of HIGH. This vulnerability affects Google Android systems, and defenders should prioritize verifying and applying patches from the vendor. The vulnerability can be exploited through a logic error in the code, and its impact is still being assessed. Defenders should review and update affected systems, specifically those running Google Android.

Defensive priority

Defenders should prioritize verifying and applying patches from the vendor, Google, as the vulnerability could lead to local escalation of privilege.

Recommended defensive actions

• Verify and apply patches from the vendor, Google.
• Review and update affected systems, specifically those running Google Android.
• Monitor system logs for potential exploitation attempts.
• 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.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, including its CVSS score of 7.8 and severity of HIGH. The vendor advisory from Google is available. The vulnerability has been analyzed and verified through various sources, including the CVE Program record and the NVD detail page. However, the exact scope of affected systems and potential impact is still being assessed.

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.