CVE-2026-58698 Overview
CVE-2026-58698 is a local privilege escalation vulnerability in the ap_pmic_poll_msg_handler function of ap_pmic_ipc.c, a component associated with the Android Power Management IC (PMIC) inter-processor communication interface. The flaw arises from a confused deputy condition that allows permission checks to be bypassed. Successful exploitation grants local escalation of privilege with System-level execution rights. No user interaction is required to trigger the vulnerability. The issue is documented in the Android Security Bulletin published in September 2026.
Critical Impact
A local attacker with elevated privileges can bypass permission checks in the PMIC IPC handler and escalate to System execution, expanding access to sensitive device subsystems.
Affected Products
- Android platform components implementing ap_pmic_ipc.c
- Pixel devices referenced in the September 2026 Android Security Bulletin
- Downstream Android builds incorporating the vulnerable PMIC IPC handler
Discovery Timeline
- 2026-09-15 - CVE-2026-58698 published to NVD
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-58698
Vulnerability Analysis
The vulnerability resides in ap_pmic_poll_msg_handler, a message handler in the Application Processor Power Management IC IPC driver. The handler processes messages on behalf of callers without adequately validating the caller's authority to perform the requested operation. This produces a classic confused deputy scenario, tracked under [CWE-441]. A privileged process acts on behalf of a less privileged caller, effectively laundering permissions across the trust boundary.
Once the handler processes the message, the attacker inherits the execution context of the System user. This grants access to device operations and subsystems that were otherwise restricted at the caller's original privilege level. The vulnerability does not require user interaction, which increases the reliability of local exploitation chains.
Root Cause
The root cause is missing or insufficient authorization checks inside ap_pmic_poll_msg_handler. The handler trusts the message content or requester identity without verifying whether the originating caller has the permissions required for the requested action. Confused deputy defects of this class typically stem from broken separation between authentication of the caller and authorization of the requested operation.
Attack Vector
Exploitation requires local access to the device and existing high privileges on the calling side, as reflected by the local attack vector and high privileges-required attributes in the CVSS metrics. An attacker with a foothold in a privileged process crafts messages to the PMIC IPC handler that cause the handler to perform actions using its System-level context. Because no user interaction is required, the attack can be chained into automated post-compromise workflows.
No public proof-of-concept exploit is currently referenced for this issue. For technical details, review the Android Security Bulletin September 2026.
Detection Methods for CVE-2026-58698
Indicators of Compromise
- Unexpected invocations of PMIC IPC message handlers from processes that do not normally interact with power management interfaces.
- Anomalous transitions to System-level execution originating from processes with lower baseline privileges.
- Log entries showing repeated or malformed messages sent to the ap_pmic_ipc interface.
Detection Strategies
- Monitor kernel and system logs for abnormal message patterns to the PMIC IPC endpoint and correlate with the calling process identity.
- Baseline the set of processes that legitimately communicate with ap_pmic_ipc and alert on deviations.
- Deploy behavioral analytics on Android endpoints to identify local privilege escalation chains that culminate in System-level actions.
Monitoring Recommendations
- Enable enhanced audit logging on affected Android builds and forward logs to a centralized analytics platform for retention and correlation.
- Track patch level compliance across the mobile fleet and alert when devices remain below the September 2026 Android security patch level.
- Review MDM telemetry for devices that have not received the vendor security update within the organization's remediation window.
How to Mitigate CVE-2026-58698
Immediate Actions Required
- Apply the September 2026 Android security patch level or later on all affected devices as soon as it is available from the device vendor.
- Inventory devices that expose the ap_pmic_ipc component and prioritize them in the patch rollout.
- Restrict installation of untrusted applications that could gain the elevated foothold required to reach the vulnerable handler.
Patch Information
The fix is delivered as part of the Android security patch documented in the Android Security Bulletin September 2026. Device manufacturers integrate the patch into their monthly security maintenance releases. Confirm the applied patch level on managed devices matches or exceeds the 2026-09-01 security patch level.
Workarounds
- No vendor-supplied workaround is published; applying the security patch is the supported remediation.
- Reduce attack surface by limiting privileged application installs and enforcing strict application vetting through the enterprise app store.
- Enforce mobile device management policies that block sideloading and require current Android security patch levels for network access.
# Verify current Android security patch level on a connected device
adb shell getprop ro.build.version.security_patch
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
