Use-after-free in Linux kernel - CVE-2026-98757

Vulnerability identifier: #VU157107

CSH Severity: Low

CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98757

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to potentially cause a kernel crash and denial of service.

The vulnerability exists due to a use-after-free in cdns3_gadget_exit() in the Linux kernel USB cdns3 gadget driver when tearing down a gadget device with deferred work still queued. A local user can exploit deferred work accessing freed device memory after teardown to potentially cause a kernel crash and denial of service.

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/159dada48ee2d53eff46e66a8011d67b2c209bbc
• https://git.kernel.org/stable/c/95160fe606e685ff18de1e6ddcbc08289476004e
• https://git.kernel.org/stable/c/cc448700db656cceb4b411bf99a2e7132144d035
• https://git.kernel.org/stable/c/ebe9b68c396792c15d0ac690d592e449e74ed804
• https://git.kernel.org/stable/c/efdf0ddaed01161dc1c1f25382856f2fd1c1f44f

• Use-after-free in Linux kernel usb cdns3 driver
• SUSE update for the Linux Kernel