Use of Uninitialized Variable in Linux kernel - CVE-2026-98760

Vulnerability identifier: #VU157122

CSH Severity: Medium

CVSS v4: 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]

CVE-ID: CVE-2026-98760

CWE-ID: CWE-457

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
SUSE Linux Micro
SUSE Linux Micro Extras
kernel-default
kernel-64kb
kernel-64kb-debugsource
kernel-64kb-devel
kernel-default-devel
kernel-syms
kernel-obs-build
kernel-obs-build-debugsource
kernel-default-debugsource
kernel-default-devel-debuginfo

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-default - update to 6.4.0-159998.55.1
kernel-64kb - update to 6.4.0-159998.55.1
kernel-64kb-debugsource - update to 6.4.0-159998.55.1
kernel-64kb-devel - update to 6.4.0-159998.55.1
kernel-default-devel - update to 6.4.0-159998.55.1
kernel-syms - update to 6.4.0-159998.55.1
kernel-obs-build - update to 6.4.0-159998.55.1
kernel-obs-build-debugsource - update to 6.4.0-159998.55.1
kernel-default-debugsource - update to 6.4.0-159998.55.1
kernel-default-devel-debuginfo - update to 6.4.0-159998.55.1

• 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

• Use of Uninitialized Variable in Linux kernel typec tipd driver
• SUSE update for the Linux Kernel