SB20260924120 - Improper handling of exceptional conditions in Linux kernel serial 8250 driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper handling of exceptional conditions (CVE-ID: CVE-2026-97481)

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

CVSSv4: 4.1 [CVSS:4.0/AV:P/AC:L/AT:P/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 cause a denial of service.

The vulnerability exists due to improper handling of FIFO error interrupts in the 8250 serial driver when the serial interface receives a flood of messages during startup and encounters a FIFO error with no data ready. An attacker with physical access can send a flood of messages to the serial interface during startup to cause a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0c6bf45e5a345cc3b9ffbeaf9083ecac3c2293eb
• https://git.kernel.org/stable/c/2881b2e6da02daea1eb8254247ba8fd20c9d3348
• https://git.kernel.org/stable/c/4295c58990b7a84e8349a2226db692e252825b60