SB2026091686 - NULL pointer dereference in Linux kernel gadget function driver
Published: September 16, 2026
Security Bulletin ID
SB2026091686
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-90024)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.
References
- 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