SB20260425135 - Use-after-free in Linux kernel usb hackrf driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-31576)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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/E:U/U:Clear

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

The vulnerability exists due to use-after-free in the hackrf driver when handling ioctl and release operations on an already-open device file after device unregistration. A local user can keep a device file descriptor open and trigger ioctl or close operations to cause a denial of service.

New open() calls are blocked after device unregistration, but already-open file descriptors and in-flight I/O remain valid until the final reference is released.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/07e9e674b6146b1f6fc41b1f54b8968bf2802824
• https://git.kernel.org/stable/c/2145c71a8044362e82e9923f001ba2aeb771b848
• https://git.kernel.org/stable/c/98a0a81ce78020c2522e0046f49d200de9778cb9
• https://git.kernel.org/stable/c/fcd1d70792a35c8a97414fe429f48311e41269c2