SB2026100769 - Race condition in Linux kernel bluetooth

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-98297)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to disrupt Bluetooth data transmission.

The vulnerability exists due to a race condition in the Bluetooth hci_send_acl(), hci_send_sco(), and hci_send_iso() functions when socket writes occur concurrently with HCI device shutdown and workqueue draining. A local user can trigger Bluetooth socket writes during workqueue draining to disrupt Bluetooth data transmission.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6610c6fe4b8936c232048e6049bf77c70a6f759c
• https://git.kernel.org/stable/c/ab0678a0701ac4de499428dc1b321659bb74d272
• https://git.kernel.org/stable/c/cbb325bc150e8c0dbce004ac0e5516bcffc0de31
• https://git.kernel.org/stable/c/e220c1242a643d97102a79f09b7ef3aa31276961