CVE-2023-54299

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.

PUBLISHED Reserved 2025-12-30 | Published 2025-12-30 | Updated 2025-12-30 | Assigner Linux

Product status

References

git.kernel.org/...c/5f71716772b88cbe0e1788f6a38d7871aff2120b

git.kernel.org/...c/38e1f2ee82bacbbfded8f1c06794a443d038d054

git.kernel.org/...c/0ad6bad31da692f8d7acacab07eabe7586239ae0

git.kernel.org/...c/0d3b5fe47938e9c451466845304a2bd74e967a80

git.kernel.org/...c/d49547950bf7f3480d6ca05fe055978e5f0d9e5b

git.kernel.org/...c/1101867a1711c27d8bbe0e83136bec47f8c1ca2a

git.kernel.org/...c/f23643306430f86e2f413ee2b986e0773e79da31

cve.org (CVE-2023-54299)

nvd.nist.gov (CVE-2023-54299)

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