SB2025071127 - NULL pointer dereference in Linux kernel pinctrl mediatek driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2025-38266)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the mtk_eint_init() function in drivers/pinctrl/mediatek/pinctrl-mtk-common.c, within the mtk_build_eint() function in drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c, within the mtk_eint_find_irq(), mtk_eint_do_init() and devm_kfree() functions in drivers/pinctrl/mediatek/mtk-eint.c. A local user can perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1c9977b263475373b31bbf86af94a5c9ae2be42c
• https://git.kernel.org/stable/c/9ebe21ede792cef851847648962c363cac67d17f