SB20261022180 - Infinite loop in Linux kernel bluetooth driver

Description

This security bulletin contains information about 1 vulnerability.

1) Infinite loop (CVE-ID: CVE-2026-98601)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows an attacker with physical access to system to cause a denial of service by making completion processing loop indefinitely.

The vulnerability exists due to an infinite loop caused by an unchecked device-supplied completion index in the btintel_pcie RX and TX completion handlers when processing DMA-shared queue indices. An attacker with physical access to system can supply a cr_hia value greater than or equal to the queue count through a controlled PCIe device to prevent the wrapped completion index from reaching the termination value and cause a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/37a11129345337efd6eef8e62b03b6348cd0dd8b
• https://git.kernel.org/stable/c/8ec5838a35b03ac0cf3602452a369898051ffaf9
• https://git.kernel.org/stable/c/b29b70bfa12133423924fcd0327c19a802f7e368
• https://git.kernel.org/stable/c/f42cd95e679d5b78611cd2208cd1c41ad0045ffa