NULL pointer dereference in Linux kernel - CVE-2026-90024

Vulnerability identifier: #VU150261

CSH Severity: Medium

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90024

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to a null-pointer dereference in f_midi2_free_ep_reqs() when configuring the MIDI 2.0 gadget through configfs with the block direction set to SNDRV_UMP_DIR_INPUT. A local user can configure the gadget with this block direction to cause a denial of service.

A host must set the alternate setting after the gadget is configured.

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/4079f19a0e1ce76f1e21a398f02aca150ceaaf61
• https://git.kernel.org/stable/c/51ddc55c75087ac25342f6d73d3aeaf14f59bd76
• https://git.kernel.org/stable/c/5b92f6a0c7c01efbb335d837ecdf34d38d98720f
• https://git.kernel.org/stable/c/9c3d5091e3568ed48ac4c5b08a78eb06fad0d70a
• https://git.kernel.org/stable/c/f0efaf1872949e96d213c8e910fd9517f7d7c406

• NULL pointer dereference in Linux kernel gadget function driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more