Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before 5f71716772b88cbe0e1788f6a38d7871aff2120b; affected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before 38e1f2ee82bacbbfded8f1c06794a443d038d054; affected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before 0ad6bad31da692f8d7acacab07eabe7586239ae0; affected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before 0d3b5fe47938e9c451466845304a2bd74e967a80; affected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before d49547950bf7f3480d6ca05fe055978e5f0d9e5b; affected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before 1101867a1711c27d8bbe0e83136bec47f8c1ca2a; affected 8a37d87d72f0c69f837229c04d2fcd7117ea57e7 before f23643306430f86e2f413ee2b986e0773e79da31 |
| Linux / Linux | affected 4.19; unaffected 0 before 4.19; unaffected 5.4.257 through 5.4.*; unaffected 5.10.195 through 5.10.*; unaffected 5.15.132 through 5.15.*; unaffected 6.1.53 through 6.1.*; unaffected 6.4.16 through 6.4.*; unaffected 6.5.3 through 6.5.*; unaffected 6.6 through * |
CWE
No CWE identifiers supplied.
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