EUVD-2026-19330
GHSA-x4r2-qwg8-443r
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Memory Corruption when accessing an output buffer without validating its size during IOCTL processing.
AnalysisAI
Memory corruption in Qualcomm Snapdragon chipsets allows authenticated local attackers with low privileges to execute arbitrary code, elevate privileges, or cause system crashes through improper IOCTL buffer validation. The vulnerability achieves complete compromise of confidentiality, integrity, and availability (CVSS 7.8 HIGH). No public exploit code identified at time of analysis, though exploitation requires only low attack complexity once local access is obtained. Qualcomm addressed this in their April 2026 security bulletin.
Technical ContextAI
This is a CWE-126 (Buffer Over-read) vulnerability occurring in Qualcomm Snapdragon chipset driver code during IOCTL (Input/Output Control) system call processing. IOCTLs are a common interface for userspace applications to communicate with kernel drivers, and improper validation of output buffer sizes can lead to memory corruption when the driver writes beyond allocated memory boundaries. The vulnerability resides in Qualcomm's proprietary driver implementation affecting their Snapdragon product line (CPE 2.3:a:qualcomm,_inc.:snapdragon), which powers billions of mobile devices globally. The lack of size validation before accessing output buffers represents a fundamental memory safety failure that can corrupt adjacent memory structures, including kernel data, leading to exploitable conditions for privilege escalation or code execution within the kernel context.
RemediationAI
Apply security updates provided in Qualcomm's April 2026 Security Bulletin available at https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html. Patching requires coordinated action between Qualcomm (chipset firmware updates), device OEM manufacturers (integration into device firmware), and end users (applying OTA updates). For enterprise-managed Android devices, administrators should verify patch deployment through mobile device management (MDM) platforms and confirm devices are running firmware incorporating the April 2026 or later Qualcomm security patch level. End users should install all available system updates from their device manufacturer. No effective workarounds exist for kernel-level driver vulnerabilities beyond restricting installation of untrusted applications and implementing defense-in-depth controls like SELinux enforcement, which may limit exploit reliability but cannot prevent the underlying vulnerability from being triggered by malicious code with appropriate permissions.
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Same weakness CWE-126 – Buffer Over-read
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today