github - ghsa-r3v3-c3jq-3938

GHSA-R3V3-C3JQ-3938

Vulnerability from github – Published: 2025-12-04 18:30 – Updated: 2025-12-04 18:30

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40263"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-04T16:16:20Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-r3v3-c3jq-3938",
  "modified": "2025-12-04T18:30:53Z",
  "published": "2025-12-04T18:30:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40263"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d251c15c27e2dd16d6318425d2f7260cbd47d39"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d81068685154535af06163eb585d6d9663ec7ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7bfd959187f2c7584bb43280bbc7b2846e7a5085"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cf59f4724a9ee06ebb06c76b8678ac322e850b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e08969c4d65ac31297fcb4d31d4808c789152f68"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2025-12-04 16:08 – Updated: 2025-12-04 16:08

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

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/7bfd959187f2c7584…
	https://git.kernel.org/stable/c/9cf59f4724a9ee06e…
	https://git.kernel.org/stable/c/6d81068685154535a…
	https://git.kernel.org/stable/c/2d251c15c27e2dd16…
	https://git.kernel.org/stable/c/e08969c4d65ac3129…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7bfd959187f2c7584bb43280bbc7b2846e7a5085 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9cf59f4724a9ee06ebb06c76b8678ac322e850b7 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6d81068685154535af06163eb585d6d9663ec7ec (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2d251c15c27e2dd16d6318425d2f7260cbd47d39 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e08969c4d65ac31297fcb4d31d4808c789152f68 (git)

Linux

Unaffected: 5.4.302 , ≤ 5.4.* (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)

Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/keyboard/cros_ec_keyb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
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            {
              "lessThan": "6d81068685154535af06163eb585d6d9663ec7ec",
              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
            },
            {
              "lessThan": "e08969c4d65ac31297fcb4d31d4808c789152f68",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/keyboard/cros_ec_keyb.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
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              "status": "unaffected",
              "version": "5.4.302",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.6.118",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.60",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.302",
                  "vulnerable": true
                },
                {
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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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      "providerMetadata": {
        "dateUpdated": "2025-12-04T16:08:23.327Z",
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        },
        {
          "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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      }
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40263",
    "datePublished": "2025-12-04T16:08:23.327Z",
    "dateReserved": "2025-04-16T07:20:57.182Z",
    "dateUpdated": "2025-12-04T16:08:23.327Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-R3V3-C3JQ-3938

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

Tags

Sightings

Nomenclature