CVE-2026-64420

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

mfd: cros_ec: Delay dev_set_drvdata() until probe success

If ec_device_probe() fails, cros_ec_class_release releases memory for the

cros_ec_dev structure. However, because the drvdata was already set,

sub-drivers like cros_ec_typec can still retrieve the stale pointer via the

platform device. This leads to a use-after-free when cros_ec_typec attempts

to access &typec->ec->ec->dev on a device that has already been released.

Move dev_set_drvdata() to ensure that the pointer is only made available

once all initialization steps have succeeded.

sysfs: cannot create duplicate filename '/class/chromeos/cros_ec'

Call trace:

sysfs_do_create_link_sd+0x94/0xdc

sysfs_create_link+0x30/0x44

device_add_class_symlinks+0x90/0x13c

device_add+0xf0/0x50c

ec_device_probe+0x150/0x4f0

platform_probe+0xa0/0xe0

...

BUG: KASAN: invalid-access in __memcpy+0x44/0x230

Write at addr f5ffff809e2d33ac by task kworker/u32:5/125

Pointer tag: [f5], memory tag: [fe]

Tainted : [W]=WARN, [O]=OOT_MODULE

Hardware name: Google Navi unprovisioned 0x7FFFFFFF/sku0 board/sku3

Workqueue: events_unbound deferred_probe_work_func

Call trace:

__memcpy+0x44/0x230

cros_ec_check_features+0x60/0xcc [cros_ec_proto]

cros_typec_probe+0xe8/0x6e0 [cros_ec_typec]

platform_probe+0xa0/0xe0