CVE-2021-47511

Name of the Vulnerable Software and Affected Versions: Linux kernel (affected versions not specified)

Description: The issue is related to the ALSA component in the Linux kernel, where the period size calculation in the OSS layer may receive a negative value as an error. However, the code assumes only positive values and handles them with size t, which can lead to a too big value being passed to the lower layers. This can cause a buffer overflow. The patch changes the code to handle the error with ssize t and adds proper error checks.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.