CVEvulnerability

CVE-2021-47509

5.5 MEDIUM Published 2024-05-24 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2024-05-24
Last modified
2026-06-17
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Affected configurations

• linux linux kernel (< 4.4.295) • linux linux kernel (>= 4.5 < 4.9.293) • linux linux kernel (>= 4.10 < 4.14.258) • linux linux kernel (>= 4.15 < 4.19.221) • linux linux kernel (>= 4.20 < 5.4.165) • linux linux kernel (>= 5.5 < 5.10.85) • linux linux kernel (>= 5.11 < 5.15.8) • linux linux kernel 5.16

References