CVE-2026-24073: Memory Corruption Buffer Overflow Vulnerability

CVE-2026-24073 Overview

CVE-2026-24073 is an out-of-bounds write vulnerability [CWE-787] affecting Qualcomm components. The flaw stems from insufficient validation of an offset value against the size of a target structure during the processing of decode statistics. A local, low-privileged attacker can trigger memory corruption that impacts confidentiality, integrity, and availability. Qualcomm disclosed the issue in its September 2026 Security Bulletin.

Critical Impact
Local exploitation can corrupt kernel or driver memory, enabling privilege escalation or arbitrary code execution within the affected component context.

Affected Products

Qualcomm components referenced in the September 2026 Security Bulletin
Specific chipsets and driver versions listed by Qualcomm in the advisory
Downstream OEM devices integrating the affected Qualcomm software

Discovery Timeline

2026-09-17 - CVE CVE-2026-24073 published to NVD
2026-09-17 - Last updated in NVD database

Technical Details for CVE-2026-24073

Vulnerability Analysis

The vulnerability occurs during the processing of decode statistics within an affected Qualcomm component. Code paths that consume statistics data accept an offset value used to index into a fixed-size structure. The implementation fails to validate that the offset remains within the structure's boundaries before writing.

This condition falls under [CWE-787] Out-of-bounds Write. When the offset exceeds the allocated structure size, writes land outside the intended memory region. The resulting corruption can overwrite adjacent kernel or driver memory used for control data.

Successful exploitation compromises confidentiality, integrity, and availability of the affected system. Attackers with local access and low privileges can escalate impact from unprivileged code to privileged execution in the component context.

Root Cause

The root cause is missing bounds validation between an attacker-influenced offset and the size of the destination structure. The decode statistics handler treats the offset as trusted and performs the write without a length or range check. Qualcomm's advisory identifies the defect within component code paths handling decoder telemetry data.

Attack Vector

Exploitation requires local access with low privileges and no user interaction. An attacker submits crafted input to the affected interface, supplying an offset value that exceeds the target structure size. The subsequent write corrupts memory adjacent to the structure. See the Qualcomm September 2026 Security Bulletin for technical details of the affected components.

Detection Methods for CVE-2026-24073

Indicators of Compromise

Unexpected kernel panics or driver crashes on devices using affected Qualcomm components
Anomalous process terminations tied to decoder or media statistics interfaces
Local processes issuing unusual ioctl or system call patterns targeting decoder telemetry

Detection Strategies

Monitor kernel logs (dmesg, logcat) for driver faults, SIGSEGV, or use-after-free traces referencing decoder components
Track processes that invoke decode-statistics interfaces from non-media contexts
Correlate crash telemetry across fleet devices to identify exploitation attempts against the same driver path

Monitoring Recommendations

Ingest mobile device crash reports into a central data lake for cross-device correlation
Baseline expected callers of decoder statistics interfaces and alert on deviations
Track patch level compliance against the Qualcomm September 2026 bulletin across managed devices

How to Mitigate CVE-2026-24073

Immediate Actions Required

Apply the vendor patch referenced in the Qualcomm September 2026 Security Bulletin once available from the device OEM
Inventory devices using affected Qualcomm chipsets and prioritize patch deployment
Restrict installation of untrusted local applications that could interact with vulnerable interfaces

Patch Information

Qualcomm published fixes in the September 2026 Security Bulletin. Device availability depends on downstream OEM and carrier integration. Coordinate with device vendors to obtain firmware updates that incorporate the Qualcomm patch.

Workarounds

Enforce application allowlisting on managed mobile devices to limit local attack surface
Disable or restrict access to media decoder interfaces where operationally feasible
Deploy mobile threat defense controls to identify local privilege escalation attempts pending patch rollout

bash

# Verify Qualcomm security patch level on Android
adb shell getprop ro.build.version.security_patch

# Confirm patch level meets or exceeds 2026-09-01