CVE-2021-47509

ALSA: pcm: oss: Limit the period size to 16MB

Medium · published May 24, 2024

CVSS v3.1
5.5
EPSS
0%
Percentile
14.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00240 · 14.2th percentile
Published
2024-05-24T15:09Z
EPSS history
Timeline
  • 24 MAY 15:09Z
    ALSA: pcm: oss: Limit the period size to 16MB
    cvelistv5