SB20260625156 - Use-after-free in Linux kernel staging greybus driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-53025)

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 greybus raw character device handling in drivers/staging/greybus/raw.c when closing an opened character device after the associated raw bundle has been disconnected. A local user can keep the character device open and then close it after disconnect to cause a denial of service.

Exploitation requires that the character device remain opened by an application while the associated raw bundle is disconnected.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/983cc2c7efbce04ecbf6328448d895044dd6ab31
• https://git.kernel.org/stable/c/ef2d97c15b19b3489de01695bce478601e236c3e