AUGUST 4, 2026
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Case File

CVE-2021-47509

MEDIUM · CVSS 5.5 EPSS 0.24%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2024-05-24 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.5. It affects Linux.

CVE
CVE-2021-47509
Severity
MEDIUM
CVSS
5.5
EPSS
0.24%
Linux

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)