SB20260325153 - Incomplete Blacklist to Cross-Site Scripting in Linux kernel pinctrl driver

Description

This security bulletin contains information about 1 security vulnerability.

1) Incomplete Blacklist to Cross-Site Scripting (CVE-ID: CVE-2026-23308)

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of interrupt masking in the pinctrl driver when loading the equilibrium GPIO controller. A local user can trigger the loading of the driver, resulting in repeated kernel warning messages being logged, which may degrade system stability and generate unnecessary log entries.

The issue arises because the function 'eqbr_irq_mask_ack()' indirectly calls 'gpiochip_disable_irq()' through 'eqbr_irq_mask()', leading to spurious warnings during initialization. This behavior does not occur in similar drivers, indicating inconsistent interrupt handling.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3e00b1b332e54ba50cca6691f628b9c06574024f
• https://git.kernel.org/stable/c/53eba152810ef0fff8567b13ea0f62d48e62df6b
• https://git.kernel.org/stable/c/896449ad9053a42c6c710aeae6175170176cabd0
• https://git.kernel.org/stable/c/af3b0ec98dc1133521b612f8009fdd36b612aabe
• https://git.kernel.org/stable/c/ec54546e8d8a50a9824c139a127a8459d1b0b1bb