SB20260812136 - Use-after-free in Linux kernel bluetooth

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-68394)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [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]

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

The vulnerability exists due to use-after-free in the Bluetooth management subsystem when processing crafted MGMT_OP_LOAD_CONN_PARAM requests that queue a connection parameter update. A local user can send crafted requests that free a queued connection-parameter entry before the queued callback runs to cause a denial of service.

The issue occurs in queued connection update handling for an existing LE central connection.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2bf282f8f715f5d05d6f4c49ffb3bd241c5e667e
• https://git.kernel.org/stable/c/57059ff14d81df4a970b2ea8d8f54431bb91a025
• https://git.kernel.org/stable/c/65ce6fe1b92112ba9064ded932c03180da3dd230
• https://git.kernel.org/stable/c/b82802b5ab26a7c69fc2e7a0f2baa3c13a6c21aa