NULL pointer dereference in Linux kernel - CVE-2026-90019
Published: September 16, 2026
Vulnerability identifier: #VU150272
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-2026-90019
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a null pointer dereference in usb_put_function_instance() when handling an error during UVC function instance allocation. A remote attacker can trigger the error path to cause a denial of service.
The issue occurs before the fd member of the function instance is allocated.
Affected software
Linux kernel
How to mitigate CVE-2026-90019
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/0fc54a00954f9f4c3e3d4ffa64a530685d99a39b
- https://git.kernel.org/stable/c/3a9691fff79bcce95338435599df6d3ae433cfdc
- https://git.kernel.org/stable/c/5117f236e9e30744338b425395d55913c4500897
- https://git.kernel.org/stable/c/6e6736c049683380f5e20becde498986e9293ca4
- https://git.kernel.org/stable/c/6e74ac5c596fd246e37eadfc354567179ccbe9aa
- https://git.kernel.org/stable/c/6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0
- https://git.kernel.org/stable/c/7a4f4ca7ff32ae24807c83e2a06d62b13378d53c
- https://git.kernel.org/stable/c/d3a7fa61997db3bf6dadef4c1bd87a4fa782a817