Vulnerability-Lookup

GHSA-C44Q-MXRG-GRC2

Vulnerability from github – Published: 2025-10-01 12:30 – Updated: 2026-01-16 21:30

Details

In the Linux kernel, the following vulnerability has been resolved:

gpiolib: cdev: fix NULL-pointer dereferences

There are several places where we can crash the kernel by requesting lines, unbinding the GPIO device, then calling any of the system calls relevant to the GPIO character device's annonymous file descriptors: ioctl(), read(), poll().

While I observed it with the GPIO simulator, it will also happen for any of the GPIO devices that can be hot-unplugged - for instance any HID GPIO expander (e.g. CP2112).

This affects both v1 and v2 uAPI.

This fixes it partially by checking if gdev->chip is not NULL but it doesn't entirely remedy the situation as we still have a race condition in which another thread can remove the device after the check.

Severity ?

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50453"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-01T12:15:38Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpiolib: cdev: fix NULL-pointer dereferences\n\nThere are several places where we can crash the kernel by requesting\nlines, unbinding the GPIO device, then calling any of the system calls\nrelevant to the GPIO character device\u0027s annonymous file descriptors:\nioctl(), read(), poll().\n\nWhile I observed it with the GPIO simulator, it will also happen for any\nof the GPIO devices that can be hot-unplugged - for instance any HID GPIO\nexpander (e.g. CP2112).\n\nThis affects both v1 and v2 uAPI.\n\nThis fixes it partially by checking if gdev-\u003echip is not NULL but it\ndoesn\u0027t entirely remedy the situation as we still have a race condition\nin which another thread can remove the device after the check.",
  "id": "GHSA-c44q-mxrg-grc2",
  "modified": "2026-01-16T21:30:28Z",
  "published": "2025-10-01T12:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50453"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/533aae7c94dbc2b14301cfd68ae7e0e90f0c8438"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d79546622baab843172b52c3af035f83c1b21df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c755a2d6df511eeb5afba966ac28140f9ea5063"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d66f68ac9e7ba46b6b90fbe25155723f2126088a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-50453 (GCVE-0-2022-50453)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:45 – Updated: 2025-10-01 11:45

Title

gpiolib: cdev: fix NULL-pointer dereferences

Summary

In the Linux kernel, the following vulnerability has been resolved: gpiolib: cdev: fix NULL-pointer dereferences There are several places where we can crash the kernel by requesting lines, unbinding the GPIO device, then calling any of the system calls relevant to the GPIO character device's annonymous file descriptors: ioctl(), read(), poll(). While I observed it with the GPIO simulator, it will also happen for any of the GPIO devices that can be hot-unplugged - for instance any HID GPIO expander (e.g. CP2112). This affects both v1 and v2 uAPI. This fixes it partially by checking if gdev->chip is not NULL but it doesn't entirely remedy the situation as we still have a race condition in which another thread can remove the device after the check.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/6d79546622baab843…
	https://git.kernel.org/stable/c/7c755a2d6df511eeb…
	https://git.kernel.org/stable/c/d66f68ac9e7ba46b6…
	https://git.kernel.org/stable/c/ac6ce3cd7a3e10a2e…
	https://git.kernel.org/stable/c/533aae7c94dbc2b14…

Impacted products

Vendor

Product

Version

Linux

Affected: d7c51b47ac11e66f547b55640405c1c474642d72 , < 6d79546622baab843172b52c3af035f83c1b21df (git)
Affected: d7c51b47ac11e66f547b55640405c1c474642d72 , < 7c755a2d6df511eeb5afba966ac28140f9ea5063 (git)
Affected: d7c51b47ac11e66f547b55640405c1c474642d72 , < d66f68ac9e7ba46b6b90fbe25155723f2126088a (git)
Affected: d7c51b47ac11e66f547b55640405c1c474642d72 , < ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3 (git)
Affected: d7c51b47ac11e66f547b55640405c1c474642d72 , < 533aae7c94dbc2b14301cfd68ae7e0e90f0c8438 (git)

Linux

Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpiolib-cdev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6d79546622baab843172b52c3af035f83c1b21df",
              "status": "affected",
              "version": "d7c51b47ac11e66f547b55640405c1c474642d72",
              "versionType": "git"
            },
            {
              "lessThan": "7c755a2d6df511eeb5afba966ac28140f9ea5063",
              "status": "affected",
              "version": "d7c51b47ac11e66f547b55640405c1c474642d72",
              "versionType": "git"
            },
            {
              "lessThan": "d66f68ac9e7ba46b6b90fbe25155723f2126088a",
              "status": "affected",
              "version": "d7c51b47ac11e66f547b55640405c1c474642d72",
              "versionType": "git"
            },
            {
              "lessThan": "ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3",
              "status": "affected",
              "version": "d7c51b47ac11e66f547b55640405c1c474642d72",
              "versionType": "git"
            },
            {
              "lessThan": "533aae7c94dbc2b14301cfd68ae7e0e90f0c8438",
              "status": "affected",
              "version": "d7c51b47ac11e66f547b55640405c1c474642d72",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpiolib-cdev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.163",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.16",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.2",
                  "versionStartIncluding": "4.8",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpiolib: cdev: fix NULL-pointer dereferences\n\nThere are several places where we can crash the kernel by requesting\nlines, unbinding the GPIO device, then calling any of the system calls\nrelevant to the GPIO character device\u0027s annonymous file descriptors:\nioctl(), read(), poll().\n\nWhile I observed it with the GPIO simulator, it will also happen for any\nof the GPIO devices that can be hot-unplugged - for instance any HID GPIO\nexpander (e.g. CP2112).\n\nThis affects both v1 and v2 uAPI.\n\nThis fixes it partially by checking if gdev-\u003echip is not NULL but it\ndoesn\u0027t entirely remedy the situation as we still have a race condition\nin which another thread can remove the device after the check."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-01T11:45:26.499Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        },
        {
          "url": "https://git.kernel.org/stable/c/ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3"
        },
        {
          "url": "https://git.kernel.org/stable/c/533aae7c94dbc2b14301cfd68ae7e0e90f0c8438"
        }
      ],
      "title": "gpiolib: cdev: fix NULL-pointer dereferences",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50453",
    "datePublished": "2025-10-01T11:45:26.499Z",
    "dateReserved": "2025-09-17T14:53:07.013Z",
    "dateUpdated": "2025-10-01T11:45:26.499Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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-C44Q-MXRG-GRC2

CVE-2022-50453 (GCVE-0-2022-50453)

Tags

Sightings

Nomenclature