CVE-2026-74519

Status: UPDATED  |  Advisory ID: CVE-2026-74519

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

pinctrl: devicetree: don't free uninitialized dev_name on error path

dt_remember_or_free_map() duplicates dev_name for each map entry. If

kstrdup_const() fails, dt_free_map() frees dev_name in all num_maps

entries, including entries that have not been initialized.

Some pinctrl drivers, including pinctrl-imx, allocate the map with

kmalloc() and leave dev_name for the core to initialize. The untouched

entries therefore contain uninitialized data which is passed to

kfree_const().

Reproduced on qemu's mcimx6ul-evk (pinctrl-imx) with failslab injection

while binding the pinctrl-consuming device, under KASAN:

BUG: KASAN: double-free in dt_free_map+0x34/0xa4

Free of addr c425a900 by task init/1

kfree from dt_free_map+0x34/0xa4

dt_free_map from dt_remember_or_free_map+0x184/0x198

dt_remember_or_free_map from pinctrl_dt_to_map+0x33c/0x4c8

pinctrl_dt_to_map from create_pinctrl+0x9c/0x5c0

Initialize all dev_name fields to NULL before duplicating the device

name, making the full-map cleanup safe after a partial failure. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References