CVE-2026-28639 Google CVE debrief

Who should care

Android system administrators and security teams should assess exposure and apply patches or updates provided by the vendor. The vulnerability affects operators of Android versions 14.0, 15.0, 16.0, and 17.0, and security teams responsible for vulnerability management and remediation. The vulnerability requires attention from system administrators and security teams to assess exposure and apply patches or updates provided by the vendor.

Why it matters

CVE-2026-28639 is a local escalation of privilege vulnerability in Android that requires attention from system administrators and security teams. Assess exposure for affected versions and apply patches or updates provided by the vendor.

• Local escalation of privilege could allow an attacker to gain elevated access to sensitive data or system functionality
• Successful exploitation requires no additional execution privileges and user interaction is not needed

Technical summary

A logic error in the rw_mfc_handle_read_op function of rw_mfc.cc could lead to a local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. The vulnerability affects Android system administrators and security teams, who should assess exposure and apply patches or updates provided by the vendor. The affected product context includes Android versions 14.0, 15.0, 16.0, and 17.0. The defensive impact includes assessing exposure, applying patches, and monitoring system logs for suspicious activity.

Defensive priority

Assess exposure and apply patches for affected Android versions.

Recommended defensive actions

• Assess exposure for Android versions 14.0, 15.0, 16.0, and 17.0
• Apply patches or updates provided by the vendor
• Monitor system logs for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• 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

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. A vendor advisory is available from Google. The vulnerability has been assessed by the CVE Program and NIST NVD, and details are available in their respective records. Android system administrators and security teams should review these sources for accurate information on affected versions and patches.

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.