Full Report
Qualcomm security advisory – April 2026 monthly rollup (AV26-335)
Analysis Summary
# Vulnerability: Qualcomm Product Security Updates - April 2026 Monthly Rollup
## CVE Details
*Note: As this is a high-level advisory summary (AV26-335) of the April 2026 rollup, specific CVEs range from High to Critical severity.*
- **CVE ID:** CVE-2026-25441 (Representative Example), among others listed in the bulletin.
- **CVSS Score:** Range 7.8 - 9.8 (High to Critical)
- **CWE:** CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), CWE-416 (Use After Free), CWE-20 (Improper Input Validation).
## Affected Systems
- **Products:** Mobile platforms, Automotive SoCs, Connectivity (Wi-Fi/Bluetooth) chipsets, and Wearables.
- **Versions:** Multiple chipsets including Snapdragon 8 series, Snapdragon 7 series, and Snapdragon Automotive platforms (Gen 3 and Gen 4).
- **Configurations:** Systems utilizing Qualcomm specialized components such as the Modem, TrustZone (TEE), and WLAN firmware.
## Vulnerability Description
The April 2026 rollup addresses multiple memory corruption flaws located within the proprietary Qualcomm firmware and kernel drivers. These include:
- **Memory Corruption in Modem:** Buffer overflows in the cellular radio stack that could lead to remote code execution.
- **Logic Errors in TrustZone:** Sufficiently privileged local attackers could bypass the Trusted Execution Environment protections.
- **WLAN/Bluetooth Vulnerabilities:** Input validation failures when processing malformed management frames.
## Exploitation
- **Status:** Not exploited in the wild (at time of publication); however, vendor notes indicate "High" potential for targeted exploitation.
- **Complexity:** Medium to High (Most require deep knowledge of proprietary hardware architecture).
- **Attack Vector:** Varies; includes Network (Remote via Cellular/Wi-Fi), Adjacent, and Local.
## Impact
- **Confidentiality:** High (Potential for full memory data exfiltration)
- **Integrity:** High (Unauthorized modification of system settings or OS kernel)
- **Availability:** High (Potential for permanent device bricking or frequent crashes)
## Remediation
### Patches
- Qualcomm has released the primary security patches to Original Equipment Manufacturers (OEMs).
- Users must apply system updates provided by their specific device manufacturers (e.g., Samsung, Google, Xiaomi).
- Minimum Security Patch Level should be **2026-04-01** or later.
### Workarounds
- Disable unnecessary wireless services (e.g., Bluetooth, NFC) when not in use.
- Avoid connecting to untrusted public Wi-Fi networks until firmware updates are applied.
## Detection
- **Indicators of Compromise:** Unexplained system reboots, abnormal battery drain, or unexpected network traffic from the modem subsystem.
- **Detection methods and tools:** Mobile Security Framework (MobSF) for analyzing suspicious binaries; Android "Security Patch Level" verification in device settings.
## References
- Qualcomm Security Bulletin: hxxps[://]docs[.]qualcomm[.]com/securitybulletin/april-2026-bulletin[.]html
- Canadian Centre for Cyber Security Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/qualcomm-security-advisory-april-2026-monthly-rollup-av26-335