Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-64134

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
19/07/2026
Last modified:
30/07/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ALSA: pcm: Don&amp;#39;t setup bogus iov_iter for silencing<br /> <br /> At transition to the iov_iter for PCM data transfer, we blindly<br /> applied the iov_iter setup also for silencing (i.e. data = NULL), and<br /> it leads to a calculation of bogus iov_iter. Fortunately this didn&amp;#39;t<br /> cause troubles on most of architectures but it goes wrong on RISC-V<br /> now, causing a NULL dereference.<br /> <br /> Handle the NULL data case to treat the silencing in interleaved_copy()<br /> for addressing the bug above. noninterleaved_copy() has already the<br /> NULL data handling, so it doesn&amp;#39;t need changes.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
7.80
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools