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CVE-2021-47509

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Limit the period size to 16MB Set the practical limit to the period size (t…

Impact

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Limit the period size to 16MB Set the practical limit to the period size (the fragment shift in OSS) instead of a full 31bit; a too large value could lead to the exhaust of memory as we allocate temporary buffers of the period size, too. As of this patch, we set to 16MB limit, which should cover all use cases.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
before 4.4.295
from 4.5 before 4.9.293
from 4.10 before 4.14.258
from 4.15 before 4.19.221
from 4.20 before 5.4.165
from 5.5 before 5.10.85

References