Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: pinctrl: mediatek: eint: Fix invalid pointer dereference for v1 platforms Commit 3ef9f710efcb ("pinctrl: mediatek: Add EINT support for multiple addresses") introduced an access to the 'soc' field of struct mtk_pinctrl in mtk_eint_do_init() and for that an include of pinctrl-mtk-common-v2.h. However, pinctrl drivers relying on the v1 common driver include pinctrl-mtk-common.h instead, which provides another definition of struct mtk_pinctrl that does not contain an 'soc' field. Since mtk_eint_do_init() can be called both by v1 and v2 drivers, it will now try to dereference an invalid pointer when called on v1 platforms. This has been observed on Genio 350 EVK (MT8365), which crashes very early in boot (the kernel trace can only be seen with earlycon). In order to fix this, since 'struct mtk_pinctrl' was only needed to get a 'struct mtk_eint_pin', make 'struct mtk_eint_pin' a parameter of mtk_eint_do_init() so that callers need to supply it, removing mtk_eint_do_init()'s dependency on any particular 'struct mtk_pinctrl'.

Affected versions

Linux: 3cc64c13deb38080afc6b37060e825d4fe0a4737 through before eae2b12df3aac874566f7025799ca4219572e44c (git); 7586766229354983cf5572f81295e69bf5abccf5 through before e578bbff985822573a27d4b7c9ec858e6014d033 (git); 00f864b4b5ce3c50f3217626c8de97fbda1b2ea6 through before abe8ad6a1a00c5c7be28b038d0ede0bdcacd8610 (git); 3ef9f710efcb5cc1335b5b09c16c757f703d7e5f through before 9ebe21ede792cef851847648962c363cac67d17f (git); 3ef9f710efcb5cc1335b5b09c16c757f703d7e5f through before 1c9977b263475373b31bbf86af94a5c9ae2be42c (git); 6.15 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.