SB20261022369 - Improper handling of exceptional conditions in Linux kernel typec tcpm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper handling of exceptional conditions (CVE-ID: CVE-2026-98761)

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

CVSSv4: 2.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows an attacker with physical access to system to leave a disconnected USB Type-C port supplying VBUS power.

The vulnerability exists due to improper handling of a failed fast role swap operation in the Linux kernel TCPM event handler when processing a fast role swap signal during cable disconnection. An attacker with physical access to system can cause a cable to signal a fast role swap to a capable port during disconnection to leave VBUS power sourcing enabled after the operation fails to start.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/184d842121e7d1fbc3a81895f36f72fa27444163
• https://git.kernel.org/stable/c/90156585765b29304f07b0e4a1c56a969876fcfc
• https://git.kernel.org/stable/c/ae8aae45a39fcf2c64813652fcb062eace220712
• https://git.kernel.org/stable/c/b2ed8643face247e513fad12e193378ba67a61a1
• https://git.kernel.org/stable/c/d6b0cce612636f79f2cf0652fce40a0cbff7f0ed