CVE-2026-43443
Description
A flaw was found in the Advanced Linux Sound Architecture (ALSA) System on Chip (ASoC) AMD Audio CoProcessor (ACP) machine common driver within the Linux kernel. The acp_card_rt5682_init() and acp_card_rt5682s_init() functions failed to validate the return values from clock acquisition calls. This oversight could lead to the dereferencing of invalid pointers by clock core functions, resulting in a kernel crash and a Denial of Service (DoS) for the system.
Statement
A Moderate flaw was found in the Advanced Linux Sound Architecture (ALSA) AMD Audio CoProcessor (ACP) machine common driver in the Linux kernel. This vulnerability, affecting Red Hat Enterprise Linux 9 and Red Hat In-Vehicle OS 2, could allow a local attacker to trigger a kernel crash by dereferencing invalid pointers during clock acquisition, leading to a system Denial of Service. Exploitation requires a system with the affected AMD audio hardware and the corresponding kernel module loaded.
Mitigation
To mitigate this issue, if the AMD Audio CoProcessor is not required, the `snd_soc_amd_acp_mach_common` kernel module can be prevented from loading. Create a file named `/etc/modprobe.d/blacklist-snd_soc_amd_acp_mach_common.conf` with the content `blacklist snd_soc_amd_acp_mach_common`. After saving the file, regenerate the initramfs and reboot the system for the changes to take effect using `dracut -f -v` followed by `reboot`. This action may disable audio functionality on systems that rely on the AMD Audio CoProcessor.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Integrity,Other
Technical Impact: Varies by Context; Unexpected State; Alter Execution Logic
An attacker could utilize an ignored error condition to place the system in an unexpected state that could lead to the execution of unintended logic and could cause other unintended behavior.
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