SB20261022368 - Use of Uninitialized Variable in Linux kernel typec tipd driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use of Uninitialized Variable (CVE-ID: CVE-2026-98760)

CWE-ID: CWE-457 - Use of Uninitialized Variable

CVSSv4: 5.2 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows an attacker with physical access to system to potentially cause a denial of service and disclose kernel stack data.

The vulnerability exists due to use of an uninitialized stack variable in tps6598x_connect() in the Linux kernel USB Type-C tipd driver when registering a port partner. An attacker with physical access to system can connect a USB device to an affected port to trigger the use of uninitialized descriptor fields, potentially causing a kernel crash through invalid callback invocation and exposing stack data through partner sysfs attributes.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/282be6ae8be791762740107c79cecf5121f66063
• https://git.kernel.org/stable/c/4b6823ce0e548491cb9663303cba28e18d351096
• https://git.kernel.org/stable/c/a39d53f70e637ff3970046c32106a0e64fca62cd
• https://git.kernel.org/stable/c/c4b27b3605788bbf9e4251f3cd4ab94645ab036f
• https://git.kernel.org/stable/c/dac0c073c6ad5f1bbb5e9fea9023fc1b4dab5e14