Use of Uninitialized Variable in Linux kernel - CVE-2026-98744

Vulnerability identifier: #VU157092

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98744

CWE-ID: CWE-457

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause incorrect audio stream configuration, potentially disrupting audio operation.

The vulnerability exists due to use of an uninitialized variable in max98363_sdw_dai_hw_params() in the Linux kernel MAX98363 codec driver when configuring SoundWire audio streams. A local user can trigger stream configuration with an indeterminate stream_config.type value, which is passed to sdw_stream_add_slave() and later copied to stream->type by sdw_config_stream(), potentially disrupting audio operation.

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/1c251426bb67de5cbfd3b5550bd5983736e8b9c7
• https://git.kernel.org/stable/c/7df8c39a50f364c04d68881e61ba1ecad29d4b72
• https://git.kernel.org/stable/c/a756c93fae312cc2bcdf157a0992e505573c530f
• https://git.kernel.org/stable/c/bcd61aa247c28b721ac21dda6e4135f75a2de29f
• https://git.kernel.org/stable/c/f44ba04c7a32bd13dbdcd814385b8629d0ee95e3

• Use of Uninitialized Variable in Linux kernel soc codecs
• SUSE update for the Linux Kernel