CVE-2025-40263
Description
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.
How to fix
- Linux Linuxd74864291cb8bd784d44d1d02e87109cf88666bb, 9cf59f4724a9ee06ebb06c76b8678ac322e850b7, 6d81068685154535af06163eb585d6d9663ec7ec, 2d251c15c27e2dd16d6318425d2f7260cbd47d39, e08969c4d65ac31297fcb4d31d4808c789152f68 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 ≤ v < d74864291cb8bd784d44d1d02e87109cf88666bb, ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 ≤ v < 9cf59f4724a9ee06ebb06c76b8678ac322e850b7, ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 ≤ v < 6d81068685154535af06163eb585d6d9663ec7ec, ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 ≤ v < 2d251c15c27e2dd16d6318425d2f7260cbd47d39, ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 ≤ v < e08969c4d65ac31297fcb4d31d4808c789152f68, 5.19 | d74864291cb8bd784d44d1d02e87109cf88666bb, 9cf59f4724a9ee06ebb06c76b8678ac322e850b7, 6d81068685154535af06163eb585d6d9663ec7ec, 2d251c15c27e2dd16d6318425d2f7260cbd47d39, e08969c4d65ac31297fcb4d31d4808c789152f68 |
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