CVE-2022-50131: HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()

Published Jun 18, 2025

Updated

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

HID: mcp2221: prevent a buffer overflow in mcpsmbuswrite()

Smatch Warning: drivers/hid/hid-mcp2221.c:388 mcpsmbuswrite() error: memcpy() '&mcp->txbuf[5]' too small (59 vs 255) drivers/hid/hid-mcp2221.c:388 mcpsmbuswrite() error: memcpy() 'buf' too small (34 vs 255)

The 'len' variable can take a value between 0-255 as it can come from data->block[0] and it is user data. So add an bound check to prevent a buffer overflow in memcpy().

Affected Software

113 affected componentsFixes available

Linux Kernel

Linux Linux kernel>=5.7<5.10.137

Linux Linux kernel>=5.11<5.15.61

Linux Linux kernel>=5.16<5.18.18

Linux Linux kernel>=5.19<5.19.2

debian/linux<6.0.2-1

6.0.2-1

debian/linux<6.0.2-1

6.0.2-1

debian/linux<6.0.2-1

6.0.2-1

debian/linux

6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1

ubuntu/linux-hwe-edge*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-azure*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-aws-5.15<5.15.0-1023.27~20.04.1

5.15.0-1023.27~20.04.1

ubuntu/linux-azure-5.15<5.15.0-1023.29~20.04.1

5.15.0-1023.29~20.04.1

ubuntu/linux-gcp-5.15<5.15.0-1022.29~20.04.1

5.15.0-1022.29~20.04.1

ubuntu/linux-hwe-5.15<5.15.0-53.59~20.04.1

5.15.0-53.59~20.04.1

ubuntu/linux-intel-iotg-5.15<5.15.0-1018.23~20.04.1

5.15.0-1018.23~20.04.1

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-53.59~20.04.1

5.15.0-53.59~20.04.1

ubuntu/linux-oracle-5.15<5.15.0-1022.28~20.04.1

5.15.0-1022.28~20.04.1

ubuntu/linux-riscv-5.15<5.15.0-1023.27~20.04.1

5.15.0-1023.27~20.04.1

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-gkeop*

ubuntu/linux-gkeop-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<5.15.0-53.59

5.15.0-53.59

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1023.27

5.15.0-1023.27

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-azure<5.15.0-1023.29

5.15.0-1023.29

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-fde<5.15.0-1024.30.1

5.15.0-1024.30.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1022.29

5.15.0-1022.29

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gke<5.15.0-1020.25

5.15.0-1020.25

ubuntu/linux-gkeop<5.15.0-1008.12

5.15.0-1008.12

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-ibm<5.15.0-1018.21

5.15.0-1018.21

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg<5.15.0-1018.23

5.15.0-1018.23

ubuntu/linux-kvm<5.15.0-1021.26

5.15.0-1021.26

ubuntu/linux-lowlatency<5.15.0-53.59

5.15.0-53.59

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-nvidia<5.15.0-1015.15

5.15.0-1015.15

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1022.28

5.15.0-1022.28

ubuntu/linux-oracle-6.5*

ubuntu/linux-raspi<5.15.0-1018.20

5.15.0-1018.20

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-realtime<5.15.0-1025.28

5.15.0-1025.28

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

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 6.0.2-1
Upgrade
Upgrade debian/linux to a version that resolves this vulnerability.
Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1
Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1023.27~20.04.1
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1023.29~20.04.1
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1022.29~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-53.59~20.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1018.23~20.04.1
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-53.59~20.04.1
Upgrade
Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1022.28~20.04.1
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1023.27~20.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-53.59
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1023.27
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1023.29
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 5.15.0-1024.30.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.15.0-1022.29
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 5.15.0-1020.25
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.15.0-1008.12
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.15.0-1018.21
Upgrade
Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.
Fixed in 5.15.0-1018.23
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.15.0-1021.26
Upgrade
Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 5.15.0-53.59
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 5.15.0-1015.15
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.15.0-1022.28
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.15.0-1018.20
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1025.28
Compensating control
Add a bounds check in drivers/hid/hid-mcp2221.c mcp_smbus_write() before memcpy(), validating the user-controlled len value from data->block[0] so it cannot exceed the destination or source buffer sizes.

Event History

Jun 18, 2025

CVE Published

via MITRE·11:02 AM

Data Sourced

via MITRE·11:02 AM

DescriptionSeverity

Data Sourced

via OSV·11:15 AM

DescriptionSeverityAffected Software

Data Sourced

via NVD·11:15 AM

RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2022-50131?

CVE-2022-50131 has been classified as a medium severity vulnerability.

What systems are affected by CVE-2022-50131?

CVE-2022-50131 affects Linux Kernel versions between 5.7 and 5.10.137, 5.11 and 5.15.61, 5.16 and 5.18.18, and 5.19 and 5.19.2.

How do I fix CVE-2022-50131?

To resolve CVE-2022-50131, update the Linux Kernel to a version that is not affected, specifically versions that are outside the ranges listed in the vulnerability details.

What type of vulnerability is CVE-2022-50131?

CVE-2022-50131 is a buffer overflow vulnerability found in the mcp_smbus_write() function of the Linux kernel.

Is there a potential exploit for CVE-2022-50131?

Yes, CVE-2022-50131 could potentially be exploited to cause a denial of service or escalation of privileges on affected systems.

CVE-2022-50131: HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()

Affected Software

Remediation

Event History

Frequently Asked Questions

What is the severity of CVE-2022-50131?

What systems are affected by CVE-2022-50131?

How do I fix CVE-2022-50131?

What type of vulnerability is CVE-2022-50131?

Is there a potential exploit for CVE-2022-50131?

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Resources

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