CVE-2026-56879

Local Privilege Escalation via gmc_mb_msg_handler Memory Corruption in Android

Published Sep 15, 2026 CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
Description
In gmc_mb_msg_handler of gmc_mba.c, there is a possible memory corruption due to a confused deputy. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
CPEs cpe:2.3:o:google:android:-:*:*:*:*:*:*:*
Type Values Removed Values Added
Title Local Privilege Escalation via gmc_mb_msg_handler Memory Corruption in Android
Type Values Removed Values Added
Title Local Privilege Escalation via Confused Deputy in Android gmc_mb_msg_handler
Type Values Removed Values Added
Title Local Privilege Escalation via Confused Deputy in Android gmc_mb_msg_handler
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-441
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
First Time appeared Google
Google android
Vendors & Products Google
Google android
Type Values Removed Values Added
Description In gmc_mb_msg_handler of gmc_mba.c, there is a possible memory corruption due to a confused deputy. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Google_Devices
Published
Updated
Sep 16, 2026, 3:57 AM
Reserved
Jun 23, 2026, 4:03 PM
Status
Analyzed
Published
Sep 15, 2026, 7:17 PM
Modified
Sep 21, 2026, 5:19 PM