CVE-2025-47333: Cryptographic Driver Buffer Overflow Flaw

CVE-2025-47333 Overview

CVE-2025-47333 is a Use After Free (CWE-416) memory corruption vulnerability affecting Qualcomm's cryptographic driver. The vulnerability occurs while handling buffer mapping operations, potentially allowing a local attacker with low privileges to corrupt memory, leading to integrity compromise and potential code execution in the context of the affected driver.

Critical Impact

Local attackers with low privileges can exploit improper buffer handling in the cryptographic driver to corrupt memory, potentially compromising system integrity and enabling further attacks on affected Qualcomm-based devices.

Affected Products

• Qualcomm Cryptographic Driver
• Qualcomm chipset-based devices utilizing the vulnerable driver
• Mobile and embedded devices running affected Qualcomm firmware

Discovery Timeline

• 2026-01-07 - CVE-2025-47333 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-47333

Vulnerability Analysis

This vulnerability stems from improper memory management within Qualcomm's cryptographic driver during buffer mapping operations. The Use After Free condition occurs when the driver fails to properly track the lifecycle of memory buffers used in cryptographic operations.

When a buffer is freed but a reference to it is retained and subsequently accessed during mapping operations, the driver may read from or write to memory that has been deallocated. This can lead to corruption of adjacent memory structures, potentially allowing an attacker to manipulate kernel data structures or execute arbitrary code with elevated privileges.

The local attack vector means an adversary requires some level of access to the target device—either through a malicious application or by exploiting another vulnerability to gain initial foothold. The low privilege requirement indicates that standard user-level access is sufficient to trigger the vulnerability.

Root Cause

The root cause is classified as CWE-416 (Use After Free), a memory safety vulnerability where the cryptographic driver continues to reference memory after it has been freed. This typically occurs due to:

• Missing or incorrect reference counting on buffer objects
• Race conditions in buffer allocation and deallocation paths
• Improper synchronization between buffer mapping and unmapping operations
• Failure to invalidate pointers after freeing associated memory

In cryptographic drivers, buffer handling is particularly sensitive as these components process security-critical data and often operate with elevated privileges within the kernel.

Attack Vector

The attack vector is local, requiring an attacker to have some form of access to the target device. Exploitation would typically involve:

1. A malicious application or process triggering specific buffer mapping operations in the cryptographic driver
2. Manipulating the timing or sequence of operations to create a Use After Free condition
3. Controlling the contents of the freed memory region before it is accessed again
4. Leveraging the memory corruption to escalate privileges or execute arbitrary code

The vulnerability allows for high integrity impact, meaning successful exploitation could allow attackers to modify protected kernel data structures or driver state. The confidentiality and availability impacts are lower, suggesting the primary risk is data modification rather than disclosure or denial of service.

Detection Methods for CVE-2025-47333

Indicators of Compromise

• Unexpected crashes or kernel panics related to the cryptographic driver or memory subsystem
• Anomalous system behavior following cryptographic operations on affected devices
• Memory corruption errors or KASAN (Kernel Address Sanitizer) violations in system logs referencing crypto driver components

Detection Strategies

• Monitor kernel logs for memory corruption warnings or driver-related crashes
• Deploy endpoint detection solutions capable of identifying exploitation attempts targeting kernel drivers
• Implement behavioral analysis to detect unusual patterns of cryptographic API calls from untrusted applications
• Use SentinelOne's Singularity platform to identify suspicious process behaviors and memory access patterns

Monitoring Recommendations

• Enable verbose logging for cryptographic subsystem operations where possible
• Monitor for applications making unusual sequences of cryptographic API calls
• Track system stability metrics that may indicate exploitation attempts
• Implement application allowlisting to prevent unauthorized code from interacting with sensitive driver interfaces

How to Mitigate CVE-2025-47333

Immediate Actions Required

• Review the Qualcomm January 2026 Security Bulletin for affected products and patch availability
• Apply vendor-provided firmware updates to affected Qualcomm-based devices as soon as available
• Limit local access to systems containing sensitive data until patches are deployed
• Monitor for suspicious activity on affected devices through endpoint detection solutions

Patch Information

Qualcomm has addressed this vulnerability in their January 2026 Security Bulletin. Organizations and device manufacturers should consult the official security bulletin for specific patch information, affected chipset models, and firmware update instructions.

Device users should ensure their devices receive the latest security updates from their device manufacturers or carriers, as the patch distribution depends on the OEM update cycle.

Workarounds

• Restrict installation of untrusted applications on affected devices to reduce local attack surface
• Implement strict application sandboxing policies to limit process access to kernel interfaces
• Use mobile device management (MDM) solutions to enforce security policies on enterprise devices
• Consider network segmentation to isolate potentially vulnerable devices from critical systems until patching is complete

# Example: Check Android security patch level
adb shell getprop ro.build.version.security_patch
# Ensure the security patch level is January 2026 or later