CVE-2025-40263: Linux

EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: Input: cros_ec_keyb - fix an invalid memory access If cros_ec_keyb_register_matrix() isn't called (due to `buttons_switches_only`) in cros_ec_keyb_probe(), `ckdev->idev` remains NULL. An invalid memory access is observed in cros_ec_keyb_process() when receiving an EC_MKBP_EVENT_KEY_MATRIX event in cros_ec_keyb_work() in such case. Unable to handle kernel read from unreadable memory at virtual address 0000000000000028 ... x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: input_event cros_ec_keyb_work blocking_notifier_call_chain ec_irq_thread It's still unknown about why the kernel receives such malformed event, in any cases, the kernel shouldn't access `ckdev->idev` and friends if the driver doesn't intend to initialize them.

Affected products

• Linux Linux: from 5.19, before 6.1.159 (fixed in 6.1.159); from 6.2, before 6.6.118 (fixed in 6.6.118); from 6.7, before 6.12.60 (fixed in 6.12.60); from 6.13, before 6.17.10 (fixed in 6.17.10)
• Siemens Ruggedcom RST2428P: before V4.0 (fixed in V4.0)

Published 2025-12-04. Last modified 2026-06-17.