USB Serial Cypress M8 Memory Corruption Fix

Executive Summary

This vulnerability in the Linux kernel involves a memory corruption issue in the cypress_m8 USB serial driver. It occurs when a malicious USB device reports a small interrupt-out endpoint max packet size, potentially causing slab memory corruption or a NULL-pointer dereference in the kernel.

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Detection Guidance

This vulnerability affects the Linux kernel's USB serial driver for Cypress M8 devices. Detection requires checking kernel logs for USB-related errors or examining the cypress_m8 driver behavior. No specific commands are provided in the context to detect this issue.

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Impact Analysis

If exploited, this flaw could allow an attacker with physical access to a system to trigger kernel memory corruption or crashes by connecting a specially crafted USB device. This might lead to denial-of-service conditions or privilege escalation on affected systems.

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Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or other standards as it involves a low-level kernel memory corruption issue in USB serial drivers. Compliance impact would depend on system-specific configurations and mitigations rather than the vulnerability itself.

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Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for the cypress_m8 driver. Ensure the interrupt-out endpoint max packet size is at least eight bytes to prevent slab corruption or NULL-pointer dereference.

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