CVE-2021-47511

ALSA: pcm: oss: Fix negative period/buffer sizes

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix negative period/buffer sizes The period size calculation in OSS layer may receive a negative value as an error, but the code there assumes only the positive values and handle them with size_t. Due to that, a too big value may be passed to the lower layers. This patch changes the code to handle with ssize_t and adds the proper error checks appropriately.

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.05%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/be8869d388593e57223ad39297c8e54be632f2f2
https://git.kernel.org/stable/c/502e1146873d870f87da3b8f93d6bf2de5f38d0c
https://git.kernel.org/stable/c/8af815ab052eaf74addbbfb556d63ce2137c0e1b
https://git.kernel.org/stable/c/f96c0959c1ee92adc911c10d6ec209af50105049
https://git.kernel.org/stable/c/f12c8a7515f641885677960af450082569a87243
https://git.kernel.org/stable/c/02b2b691b77cd7b951fa7b6c9d44d4e472cdc823
https://git.kernel.org/stable/c/00a860678098fcd9fa8db2b5fb9d2ddf4776d4cc
https://git.kernel.org/stable/c/9d2479c960875ca1239bcb899f386970c13d9cfe

Frequently Asked Questions

What is the severity of CVE-2021-47511?: CVE-2021-47511 has been scored as a medium severity vulnerability.
How to fix CVE-2021-47511?: To fix CVE-2021-47511, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47511 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-47511 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47511?: CVE-2021-47511 affects Linux Linux, Linux Linux.

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