Race condition in Linux kernel - CVE-2026-98765

Vulnerability identifier: #VU157128

CSH Severity: Low

CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98765

CWE-ID: CWE-362

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local privileged user to potentially cause a denial of service through a race between USB gadget request completion and driver teardown.

The vulnerability exists due to incomplete synchronization of request completion callbacks in the Linux kernel dummy-hcd driver when waiting for outstanding callbacks during gadget driver teardown. A local privileged user can trigger overlapping request completion and teardown operations, potentially allowing a gadget driver's module to be unloaded while a completion handler is still running and causing a kernel crash.

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/3070806a7bc7bb36ed04a21022c09dafcc5619f4
• https://git.kernel.org/stable/c/5298c96bf0068f3160969f7ddad81976d01a9b66
• https://git.kernel.org/stable/c/6849e51b89de5b6fc7447dc8e612b58df19c7dea
• https://git.kernel.org/stable/c/7ce4dca0d53b1c3cb2b7e7bb2e42bf5db860caf2
• https://git.kernel.org/stable/c/b263ff9b0fc5c1f371d65c4eb196b31263d039ff

• Race condition in Linux kernel gadget udc driver
• SUSE update for the Linux Kernel