Buffer Overflow in Linux Kernel Affecting Media Device Communication

CVE-2022-49035

Summary

A vulnerability in the Linux kernel presents a potential risk in media device communication, particularly in implementations employing the Consumer Electronics Control (CEC) protocol. The flaw arises from the failure to properly limit the message length to the defined CEC_MAX_MSG_SIZE. Although hardware implementations are expected to constrain this to a maximum of 16 bytes, there is a possibility that this may not be enforced, leaving a corner case open for exploitation. This oversight could allow attackers to conduct unauthorized actions or trigger unexpected behavior within the affected systems. The Linux development community has addressed this issue in recent updates, underscoring the importance of applying security patches promptly.

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