SB2026081644 - Improper resource shutdown or release in Linux kernel bluetooth

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-72333)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper resource management in the Bluetooth L2CAP LE credit handling logic when processing repeated LE CoC traffic. A remote attacker can stream data to the host to exhaust the signaling identifier range and cause a denial of service.

The issue can cause subsequent L2CAP_LE_CREDITS packets to be sent with invalid identifier 0, which some remote stacks ignore, permanently stalling the channel.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0c602cb8f148a36bfb39c25ade400bdadc023c4f
• https://git.kernel.org/stable/c/6e1930ece855a4c256f1c7e6632d634cfb9888b5
• https://git.kernel.org/stable/c/b8a32a5fc915b024c60f18d51b6cffd2bd64d4a6
• https://git.kernel.org/stable/c/bd1e01170341291292fd4c46b5f6949da282ca6c
• https://git.kernel.org/stable/c/d0a2b0c81f112540a337cde1c20251bf05ddf1da