Use-after-free in Linux kernel - CVE-2026-98763

Vulnerability identifier: #VU157126

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98763

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to potentially cause a denial of service through a kernel use-after-free.

The vulnerability exists due to incomplete clearing of endpoint pointers in usb_disable_endpoint() when disabling a non-zero USB control endpoint with reset_hardware set. A local user can trigger this endpoint lifecycle to leave the opposite direction's endpoint array entry pointing to disabled or freed memory, potentially causing a kernel crash if the stale pointer is subsequently used.

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/0e8baa78d872f2db440d8b9ded946ab8dceb89eb
• https://git.kernel.org/stable/c/198d74dcfa129523125f46a89479d3b446b17dbe
• https://git.kernel.org/stable/c/1da16c46b8d7101b74bc2d72a04e23cf5c7ddea1
• https://git.kernel.org/stable/c/7a9f61476b0e8002092a52ee8295edeeb0a28d1e
• https://git.kernel.org/stable/c/c50413ecb662ea43c7f487632c8114721743a277

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