Use-after-free in Linux kernel - CVE-2026-74642

Vulnerability identifier: #VU144895

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-2026-74642

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to use-after-free in the ALSA USB MIDI2 endpoint handling code when performing delayed release of UMP endpoints. A local user can trigger delayed endpoint release conditions to cause a 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/422d8a02de5ce6a29d616d55e5ead5dec69ac1d7
• https://git.kernel.org/stable/c/d217d723c5e43881b952cdb978477f7f2dc0b6d7
• https://git.kernel.org/stable/c/d431941825d357be7d9ab0cb7505e3a1963bd89e
• https://git.kernel.org/stable/c/f8a80cfb68613fb7e6452b66447dbc63f435d140
• https://git.kernel.org/stable/c/f9d492a39ebeb1a56f13ec6dd165a18a48dec812

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