Not yet scoredPublished Dec 30, 2025

CVE-2023-54299usb: typec: bus: verify partner exists in typec_altmode_attention

Updated under an hour ago (Oct 27, 2026, 3:23 AM ET)

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	8a37d87d72f0c69f837229c04d2fcd7117ea57e7 builds before 5f71716772b88cbe0e1788f6a38d7871aff2120b; from 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before 38e1f2ee82bacbbfded8f1c06794a443d038d054; 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 builds before 0ad6bad31da692f8d7acacab07eabe7586239ae0; 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 builds before 0d3b5fe47938e9c451466845304a2bd74e967a80; from 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before d49547950bf7f3480d6ca05fe055978e5f0d9e5b; from 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before 1101867a1711c27d8bbe0e83136bec47f8c1ca2a; from 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before f23643306430f86e2f413ee2b986e0773e79da31	CNA record

References

References

https://git.kernel.org/stable/c/5f71716772b88cbe0e1788f6a38d7871aff2120b
https://git.kernel.org/stable/c/38e1f2ee82bacbbfded8f1c06794a443d038d054
https://git.kernel.org/stable/c/0ad6bad31da692f8d7acacab07eabe7586239ae0
https://git.kernel.org/stable/c/0d3b5fe47938e9c451466845304a2bd74e967a80
https://git.kernel.org/stable/c/d49547950bf7f3480d6ca05fe055978e5f0d9e5b
https://git.kernel.org/stable/c/1101867a1711c27d8bbe0e83136bec47f8c1ca2a
https://git.kernel.org/stable/c/f23643306430f86e2f413ee2b986e0773e79da31

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.