CVE-2026-24076: Buffer Overflow Vulnerability

CVE-2026-24076 Overview

CVE-2026-24076 is a memory corruption vulnerability disclosed in the Qualcomm August 2026 Security Bulletin. The flaw occurs when processing registry values with incorrect types using a direct query method. An attacker with local access and high privileges can trigger memory corruption that impacts confidentiality, integrity, and availability. The vulnerability is categorized under [CWE-120] (Buffer Copy without Checking Size of Input). No public exploit is currently available, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog.

Critical Impact
Successful exploitation results in memory corruption within a privileged component, enabling potential code execution or system compromise on affected Qualcomm platforms.

Affected Products

Qualcomm components referenced in the August 2026 Security Bulletin
Specific chipsets and software versions listed in the vendor advisory
Consult the Qualcomm August 2026 Security Bulletin for the full inventory

Discovery Timeline

2026-08-04 - CVE-2026-24076 published to NVD
2026-08-06 - Last updated in NVD database

Technical Details for CVE-2026-24076

Vulnerability Analysis

The vulnerability resides in code that reads registry values through a direct query method. When the code receives a registry value whose stored type differs from the type the caller expects, the routine fails to validate the type or the corresponding buffer size before operating on the data. The mismatch leads to memory corruption in the calling component.

Because the attack vector is local and requires high privileges, the flaw is most relevant as a post-compromise escalation primitive. An attacker who already holds elevated privileges on the device can use the corruption to further compromise the affected component, potentially escalating into more privileged execution contexts.

Root Cause

The root cause is missing or incorrect type validation on registry value data before it is copied or interpreted. Under [CWE-120], the affected function copies input into a fixed-size buffer without verifying the declared type matches the expected structure, allowing an oversized or malformed value to overwrite adjacent memory.

Attack Vector

Exploitation requires local access with high privileges and no user interaction. An attacker plants or modifies a registry value with a mismatched type, then triggers the direct query path in the vulnerable component. The subsequent memory corruption can be shaped to overwrite control data structures within the process.

No verified proof-of-concept code is available. Refer to the Qualcomm August 2026 Security Bulletin for vendor-provided technical details.

Detection Methods for CVE-2026-24076

Indicators of Compromise

Unexpected process crashes or kernel faults originating from Qualcomm driver or firmware components
Registry values with type declarations inconsistent with their documented schemas
Anomalous privileged writes to registry keys queried by Qualcomm components

Detection Strategies

Monitor privileged process behavior for abnormal registry access patterns preceding crashes
Correlate registry modification events with subsequent faults in Qualcomm software components
Baseline expected registry value types for affected keys and alert on deviations

Monitoring Recommendations

Ingest endpoint telemetry covering registry writes, process crashes, and kernel event logs into a centralized analytics platform
Track privileged local sessions that modify registry entries consumed by vendor drivers
Retain crash dumps from affected components for forensic analysis of potential exploitation attempts

How to Mitigate CVE-2026-24076

Immediate Actions Required

Inventory devices running affected Qualcomm components identified in the August 2026 bulletin
Apply vendor-supplied patches through the OEM update channel as soon as they become available
Restrict local administrative access on affected systems to limit exposure to the required privilege level

Patch Information

Qualcomm has published fix information in the Qualcomm August 2026 Security Bulletin. Downstream OEMs must integrate the fix into device firmware and distribute it through their standard update channels. Verify patch deployment by checking build identifiers against the vendor advisory.

Workarounds

Enforce least-privilege policies to prevent unauthorized local privileged access
Audit and lock down registry keys queried by affected Qualcomm components where feasible
Segment high-value devices to reduce lateral movement opportunities until patches are applied

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# Configuration example
# Refer to the Qualcomm August 2026 Security Bulletin for vendor-specific
# mitigation guidance and patch identifiers.