CVE-2021-46926 ALSA: hda: intel-sdw-acpi: harden detection of controller

What is CVE-2021-46926?

CVE-2021-46926 is a medium-severity vulnerability in Linux kernel, published on 27 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

ALSA: hda: intel-sdw-acpi: harden detection of controller

The existing code currently sets a pointer to an ACPI handle before checking that it's actually a SoundWire controller. This can lead to issues where the graph walk continues and eventually fails, but the pointer was set already.

This patch changes the logic so that the information provided to the caller is set when a controller is found.

Which versions are affected by CVE-2021-46926?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2021-46926?

Apply the vendor's patch.

Is CVE-2021-46926 being exploited?

There is no known exploitation of CVE-2021-46926 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2021-46926, GHSA-g85h-w3x6-7g28, ROOT-OS-DEBIAN-11-CVE-2021-46926, UBUNTU-CVE-2021-46926.