CVE-2025-40263 (GCVE-0-2025-40263)

Vulnerability from cvelistv5 – Published: 2025-12-04 16:08 – Updated: 2026-06-02 13:00
VLAI
Title
Input: cros_ec_keyb - fix an invalid memory access
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 , < d74864291cb8bd784d44d1d02e87109cf88666bb (git)
Affected: ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 , < 9cf59f4724a9ee06ebb06c76b8678ac322e850b7 (git)
Affected: ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 , < 6d81068685154535af06163eb585d6d9663ec7ec (git)
Affected: ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 , < 2d251c15c27e2dd16d6318425d2f7260cbd47d39 (git)
Affected: ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0 , < e08969c4d65ac31297fcb4d31d4808c789152f68 (git)
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Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.118 , ≤ 6.6.* (semver)
Unaffected: 6.12.60 , ≤ 6.12.* (semver)
Unaffected: 6.17.10 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens RUGGEDCOM RST2428P Affected: 0 , < V4.0 (custom)
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Show details on NVD website
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: cros_ec_keyb - fix an invalid memory access\n\nIf cros_ec_keyb_register_matrix() isn\u0027t called (due to\n`buttons_switches_only`) in cros_ec_keyb_probe(), `ckdev-\u003eidev` remains\nNULL.  An invalid memory access is observed in cros_ec_keyb_process()\nwhen receiving an EC_MKBP_EVENT_KEY_MATRIX event in cros_ec_keyb_work()\nin such case.\n\n  Unable to handle kernel read from unreadable memory at virtual address 0000000000000028\n  ...\n  x3 : 0000000000000000 x2 : 0000000000000000\n  x1 : 0000000000000000 x0 : 0000000000000000\n  Call trace:\n  input_event\n  cros_ec_keyb_work\n  blocking_notifier_call_chain\n  ec_irq_thread\n\nIt\u0027s still unknown about why the kernel receives such malformed event,\nin any cases, the kernel shouldn\u0027t access `ckdev-\u003eidev` and friends if\nthe driver doesn\u0027t intend to initialize them."
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}



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