Vulnerability CVE-2021-47509
Published: 2024-05-24

Description:
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.

 References:
https://git.kernel.org/stable/c/d1bb703ad050de9095f10b2d3416c32921ac6bcc
https://git.kernel.org/stable/c/b02a41eebcc36d4f07196780f2e165ca2c499257
https://git.kernel.org/stable/c/be55f306396cd62c6889286a7194fd8b53363aeb
https://git.kernel.org/stable/c/2e54cf6794bf82a54aaefc78da13819aea9cd28a
https://git.kernel.org/stable/c/76f19e4cbb548e28547f8c328aa0bfb3a10222d3
https://git.kernel.org/stable/c/ad45babf7886e7a212ee1d5eda9ef49f696db43c
https://git.kernel.org/stable/c/35a3e511032146941085f87dd9fb5b82ea5c00a2
https://git.kernel.org/stable/c/8839c8c0f77ab8fc0463f4ab8b37fca3f70677c2
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