CVE-2021-47509

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

CVSS 5.5 MEDIUMEPSS 0.2%

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.5EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

24 May 2024Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Linux · Linux

References

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