CVE-2025-40263 (GCVE-0-2025-40263)
Vulnerability from cvelistv5 – Published: 2025-12-04 16:08 – Updated: 2026-06-02 13:00
VLAI
EPSS
VEX
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
6 references
Impacted products
3 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) |
guessed | |
| 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 | |
| Siemens | RUGGEDCOM RST2428P |
Affected:
0 , < V4.0
(custom)
|
guessed |
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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."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T21:45:57.409Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"url": "https://git.kernel.org/stable/c/d74864291cb8bd784d44d1d02e87109cf88666bb"
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"url": "https://git.kernel.org/stable/c/9cf59f4724a9ee06ebb06c76b8678ac322e850b7"
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"url": "https://git.kernel.org/stable/c/2d251c15c27e2dd16d6318425d2f7260cbd47d39"
},
{
"url": "https://git.kernel.org/stable/c/e08969c4d65ac31297fcb4d31d4808c789152f68"
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],
"title": "Input: cros_ec_keyb - fix an invalid memory access",
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"datePublished": "2025-12-04T16:08:23.327Z",
"dateReserved": "2025-04-16T07:20:57.182Z",
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"source": "Microsoft CSAF VEX",
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"title": "Input: cros_ec_keyb - fix an invalid memory access",
"url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-40263.json",
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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."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nEntrada: cros_ec_keyb - corrige un acceso a memoria no v\u00e1lido\n\nSi cros_ec_keyb_register_matrix() no es llamada (debido a \u0027buttons_switches_only\u0027) en cros_ec_keyb_probe(), \u0027ckdev -\u003e idev\u0027 permanece NULL. Se observa un acceso a memoria no v\u00e1lido en cros_ec_keyb_process() al recibir un evento EC_MKBP_EVENT_KEY_MATRIX en cros_ec_keyb_work() en tal caso.\n\nNo se puede manejar la lectura del kernel desde memoria ilegible en la direcci\u00f3n virtual 0000000000000028\n...\nx3 : 0000000000000000 x2 : 0000000000000000\nx1 : 0000000000000000 x0 : 0000000000000000\nRastro de llamada:\ninput_event\ncros_ec_keyb_work\nblocking_notifier_call_chain\nec_irq_thread\n\nA\u00fan se desconoce por qu\u00e9 el kernel recibe un evento tan malformado, en cualquier caso, el kernel no deber\u00eda acceder a \u0027ckdev -\u003e idev\u0027 y sus relacionados si el controlador no tiene la intenci\u00f3n de inicializarlos."
}
],
"id": "CVE-2025-40263",
"lastModified": "2026-10-18T18:10:00.100",
"metrics": {},
"published": "2025-12-04T16:16:20.340",
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"id": "CVE-2025-40263",
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"source": "Red Hat CSAF VEX",
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"title": "kernel: Input: cros_ec_keyb - fix an invalid memory access",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40263.json",
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}
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Sightings
| Author | Source | Type | Date | Other |
|---|
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.