SB20261023156 - Use-after-free in Linux kernel bluetooth

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-99011)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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]

The vulnerability allows a local user to cause a denial of service through kernel memory corruption.

The vulnerability exists due to a use-after-free in the Linux kernel Bluetooth SCO connection handling code when receiving SCO data concurrently with connection teardown. A local user can trigger a race between sco_recv_scodata() and sco_conn_free() to cause a denial of service when the receive path attempts to acquire a reference to an already freed sco_conn object through hcon->sco_data.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/816fb1590a4c8cf8d05cd076057616be02e276f0
• https://git.kernel.org/stable/c/8a98d58f6cfe70d51138cd9ce894e72671d95f8a
• https://git.kernel.org/stable/c/b108ea7ebba147465f4158d8133f0e8f013762ed