Riskcovery

CVE-2025-40263

Input: cros_ec_keyb - fix an invalid memory access

State
Published
Severity
Not scored
Published
Dec 4, 2025
Updated
Jun 2, 2026
Reserved
Apr 16, 2025

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 to before d74864291cb8bd784d44d1d02e87109cf88666bbAffected
  • ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 to before 9cf59f4724a9ee06ebb06c76b8678ac322e850b7Affected
  • ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 to before 6d81068685154535af06163eb585d6d9663ec7ecAffected
  • ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 to before 2d251c15c27e2dd16d6318425d2f7260cbd47d39Affected
  • ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 to before e08969c4d65ac31297fcb4d31d4808c789152f68Affected
LinuxLinux
  • 5.19Affected
  • before 5.19Not affected
  • 6.1.159 through 6.1.*Not affected
  • 6.6.118 through 6.6.*Not affected
  • 6.12.60 through 6.12.*Not affected
  • 6.17.10 through 6.17.*Not affected
  • 6.18 and laterNot affected

References

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