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CVE-2025-40263 In the Linux kernel, the following vulnerability has been resolved: Input: cros_ec_keyb - fix an invalid memory access…

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.

Affected products and versions

Product Affected versions Fixed in
Linux 6.18 earliest → < 6.18 6.18
Linux 6.17 earliest → < 6.17.10 6.17.10
Linux 6.12 earliest → < 6.12.60 6.12.60
Linux 6.6 earliest → < 6.6.118 6.6.118
Linux 6.1 earliest → < 6.1.159 6.1.159
Linux 5.19 No fix stated
RUGGEDCOM RST2428P 4.0 earliest → < 4.0 4.0

References

Timeline

  1. Published
  2. Last modified

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