CVE-2021-47511

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

24/05/2024

Last modified:

29/09/2025

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		4.4.295 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.5 (including)	4.9.293 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.10 (including)	4.14.258 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.15 (including)	4.19.221 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.165 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.85 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.8 (excluding)
cpe:2.3:o:linux:linux_kernel:5.16:rc1::::::
cpe:2.3:o:linux:linux_kernel:5.16:rc2::::::
cpe:2.3:o:linux:linux_kernel:5.16:rc3::::::
cpe:2.3:o:linux:linux_kernel:5.16:rc4::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-47511

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools