CVE-2026-64134

kernel: ALSA: pcm: Don't setup bogus iov_iter for silencing

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · July 19, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's Advanced Linux Sound Architecture (ALSA) Pulse Code Modulation (PCM) subsystem. During PCM data transfer, an incorrect setup of the iov_iter for silencing (when data is null) could lead to a NULL pointer dereference. This vulnerability can be triggered by a local user, potentially causing a system crash (Denial of Service).

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference