CVE-2026-21366 in Snapdragon Auto
Summary
by MITRE • 08/04/2026
Memory corruption while processing a packet with a size close to the maximum allowed value.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 08/04/2026
This vulnerability represents a classic memory corruption issue that occurs during network packet processing when packets approach the maximum allowable size limits. The flaw manifests when the system attempts to handle packets that are nearly at their maximum permitted dimensions, creating conditions where buffer boundaries may be exceeded or memory allocation parameters become invalid. Such scenarios typically arise in network protocol implementations where packet size validation and memory management routines fail to properly account for edge cases near maximum thresholds. The technical execution involves the system's failure to adequately validate packet dimensions before processing, leading to potential overflows, underflows, or improper memory access patterns that can result in arbitrary code execution or system instability.
The operational impact of this vulnerability extends beyond simple denial of service conditions to potentially enable remote code execution attacks when exploited by malicious actors. Attackers can craft specially formatted packets that trigger the memory corruption during processing, potentially allowing them to overwrite critical memory locations, manipulate program flow, or inject malicious code into the targeted system. This type of vulnerability commonly affects network infrastructure devices such as firewalls, routers, intrusion detection systems, and network monitoring tools that must process incoming packets with various sizes and formats. The exploitation potential is significantly enhanced when the affected system processes untrusted network traffic without proper input sanitization or memory boundary checking mechanisms.
Security professionals should implement comprehensive mitigation strategies including input validation at all network protocol layers, strict packet size enforcement with appropriate buffer management, and regular firmware updates from vendors to address known memory corruption vulnerabilities. Network segmentation and access control measures can help reduce the attack surface by limiting exposure to potentially malicious traffic. The vulnerability aligns with CWE-122 (Heap-based Buffer Overflow) and CWE-787 (Out-of-bounds Write) categories, representing common weaknesses in memory management within network processing applications. From an ATT&CK framework perspective, this vulnerability maps to techniques involving command and control communication, privilege escalation, and initial access through network protocols, with potential for lateral movement when exploited in network infrastructure devices. Organizations should prioritize patch management programs, implement network monitoring for anomalous packet patterns, and conduct regular security assessments of network equipment to identify and remediate similar memory handling vulnerabilities across their infrastructure.