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

Q: What is the severity of CVE-2021-46926?

CVE-2021-46926 has a moderate severity rating as it involves potential issues with controller detection in the ALSA subsystem of the Linux kernel.

Q: How do I fix CVE-2021-46926?

To fix CVE-2021-46926, you should update your Linux kernel to a version that includes the patches, specifically versions 5.10.226-1 or higher.

Q: Which Linux kernel versions are affected by CVE-2021-46926?

CVE-2021-46926 affects Linux kernel versions up to and including 5.15.13.

Q: Is CVE-2021-46926 specific to a particular Linux distribution?

CVE-2021-46926 is not limited to a single distribution, but it is known to impact Debian packages and the Linux kernel across various distributions.

Q: What components of the Linux kernel are involved in CVE-2021-46926?

CVE-2021-46926 specifically involves the ALSA subsystem and its handling of SoundWire controllers in the Linux kernel.

Published Feb 27, 2024

Updated

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.

Affected Software

96 affected componentsFixes available

Linux Linux kernel<5.15.13

debian/linux<=5.10.223-1, <=5.10.234-1

6.1.129-16.1.135-16.12.25-16.12.27-1

ubuntu/linux-hwe-edge*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1131.141~18.04.1

5.4.0-1131.141~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1136.143~18.04.1

5.4.0-1136.143~18.04.1

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1135.144~18.04.1

5.4.0-1135.144~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-193.213~18.04.1

5.4.0-193.213~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1078.83~18.04.1

5.4.0-1078.83~18.04.1

ubuntu/linux-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4<5.4.0-1130.139~18.04.1

5.4.0-1130.139~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1115.127~18.04.1

5.4.0-1115.127~18.04.1

ubuntu/linux<5.4.0-193.213

5.4.0-193.213

ubuntu/linux-aws<5.4.0-1131.141

5.4.0-1131.141

ubuntu/linux-azure<5.4.0-1136.143

5.4.0-1136.143

ubuntu/linux-bluefield<5.4.0-1091.98

5.4.0-1091.98

ubuntu/linux-gcp<5.4.0-1135.144

5.4.0-1135.144

ubuntu/linux-gkeop<5.4.0-1098.102

5.4.0-1098.102

ubuntu/linux-ibm<5.4.0-1078.83

5.4.0-1078.83

ubuntu/linux-iot<5.4.0-1043.44

5.4.0-1043.44

ubuntu/linux-kvm<5.4.0-1119.127

5.4.0-1119.127

ubuntu/linux-oracle<5.4.0-1130.139

5.4.0-1130.139

ubuntu/linux-raspi<5.4.0-1115.127

5.4.0-1115.127

ubuntu/linux-xilinx-zynqmp<5.4.0-1050.54

5.4.0-1050.54

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.8*

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.8*

ubuntu/linux-gke*

ubuntu/linux-gke-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.8*

ubuntu/linux-intel-5.13*

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.8*

ubuntu/linux-aws-fips<5.4.0-1131.141+fips1

5.4.0-1131.141+fips1

ubuntu/linux-azure-fips<5.4.0-1136.143+fips1

5.4.0-1136.143+fips1

ubuntu/linux-fips<5.4.0-1105.115

5.4.0-1105.115

ubuntu/linux-gcp-fips<5.4.0-1135.144+fips1

5.4.0-1135.144+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-nvidia-6.2*

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-raspi-realtime*

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade debian/linux to a version that resolves this vulnerability.
Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1
Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1131.141~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1136.143~18.04.1
Upgrade
Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.144~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-193.213~18.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1078.83~18.04.1
Upgrade
Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1130.139~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1115.127~18.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-193.213
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1131.141
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1136.143
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1091.98
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.144
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.4.0-1098.102
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.4.0-1078.83
Upgrade
Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.
Fixed in 5.4.0-1043.44
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1119.127
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.4.0-1130.139
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1115.127
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.4.0-1050.54
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1131.141+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1136.143+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1105.115
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.144+fips1

Event History

Feb 27, 2024

CVE Published

via MITRE·09:43 AM

Data Sourced

via MITRE·09:43 AM

Description

Data Sourced

via OSV·10:15 AM

DescriptionSeverityAffected Software

Frequently Asked Questions

What is the severity of CVE-2021-46926?

CVE-2021-46926 has a moderate severity rating as it involves potential issues with controller detection in the ALSA subsystem of the Linux kernel.

How do I fix CVE-2021-46926?