CVE-2023-54299

usb: typec: bus: verify partner exists in typec_altmode_attention

State: Published
Severity: Not scored
Published: Dec 30, 2025
Updated: May 11, 2026
Reserved: Dec 30, 2025

Description

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

usb: typec: bus: verify partner exists in typec_altmode_attention

Some usb hubs will negotiate DisplayPort Alt mode with the device but will then negotiate a data role swap after entering the alt mode. The data role swap causes the device to unregister all alt modes, however the usb hub will still send Attention messages even after failing to reregister the Alt Mode. type_altmode_attention currently does not verify whether or not a device's altmode partner exists, which results in a NULL pointer error when dereferencing the typec_altmode and typec_altmode_ops belonging to the altmode partner.

Verify the presence of a device's altmode partner before sending the Attention message to the Alt Mode driver.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before 5f71716772b88cbe0e1788f6a38d7871aff2120bAffected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before 38e1f2ee82bacbbfded8f1c06794a443d038d054Affected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before 0ad6bad31da692f8d7acacab07eabe7586239ae0Affected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before 0d3b5fe47938e9c451466845304a2bd74e967a80Affected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before d49547950bf7f3480d6ca05fe055978e5f0d9e5bAffected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before 1101867a1711c27d8bbe0e83136bec47f8c1ca2aAffected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before f23643306430f86e2f413ee2b986e0773e79da31Affected
LinuxLinux	4.19Affected before 4.19Not affected 5.4.257 through 5.4.Not affected 5.10.195 through 5.10.Not affected 5.15.132 through 5.15.Not affected 6.1.53 through 6.1.Not affected 6.4.16 through 6.4.Not affected 6.5.3 through 6.5.Not affected 6.6 and laterNot affected

Product

Versions

LinuxLinux

8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before 5f71716772b88cbe0e1788f6a38d7871aff2120bAffected
8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before 38e1f2ee82bacbbfded8f1c06794a443d038d054Affected
8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before 0ad6bad31da692f8d7acacab07eabe7586239ae0Affected
8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before 0d3b5fe47938e9c451466845304a2bd74e967a80Affected
8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before d49547950bf7f3480d6ca05fe055978e5f0d9e5bAffected
8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before 1101867a1711c27d8bbe0e83136bec47f8c1ca2aAffected
8a37d87d72f0c69f837229c04d2fcd7117ea57e7 to before f23643306430f86e2f413ee2b986e0773e79da31Affected

LinuxLinux

4.19Affected
before 4.19Not affected
5.4.257 through 5.4.*Not affected
5.10.195 through 5.10.*Not affected
5.15.132 through 5.15.*Not affected
6.1.53 through 6.1.*Not affected
6.4.16 through 6.4.*Not affected
6.5.3 through 6.5.*Not affected
6.6 and laterNot affected

References

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