Vulnerability-Lookup

GHSA-H6GR-4677-26P9

Vulnerability from github – Published: 2024-05-21 15:31 – Updated: 2024-11-06 21:30

Details

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

hwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field

If driver read tmp value sufficient for (tmp & 0x08) && (!(tmp & 0x80)) && ((tmp & 0x7) == ((tmp >> 4) & 0x7)) from device then Null pointer dereference occurs. (It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers) Also lm75[] does not serve a purpose anymore after switching to devm_i2c_new_dummy_device() in w83791d_detect_subclients().

The patch fixes possible NULL pointer dereference by removing lm75[].

Found by Linux Driver Verification project (linuxtesting.org).

[groeck: Dropped unnecessary continuation lines, fixed multi-line alignments]

Severity ?

5.3 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47384"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:23Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field\n\nIf driver read tmp value sufficient for\n(tmp \u0026 0x08) \u0026\u0026 (!(tmp \u0026 0x80)) \u0026\u0026 ((tmp \u0026 0x7) == ((tmp \u003e\u003e 4) \u0026 0x7))\nfrom device then Null pointer dereference occurs.\n(It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers)\nAlso lm75[] does not serve a purpose anymore after switching to\ndevm_i2c_new_dummy_device() in w83791d_detect_subclients().\n\nThe patch fixes possible NULL pointer dereference by removing lm75[].\n\nFound by Linux Driver Verification project (linuxtesting.org).\n\n[groeck: Dropped unnecessary continuation lines, fixed multi-line alignments]",
  "id": "GHSA-h6gr-4677-26p9",
  "modified": "2024-11-06T21:30:54Z",
  "published": "2024-05-21T15:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47384"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6cb01fe630eaffc5a2c3f7364436caddba286623"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/746011193f44f97f8784edcf8327c587946745fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c4fd5de39f273626a2b0f3a446d2cc85cd47616"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd4d747ef05addab887dc8ff0d6ab9860bbcd783"
    }
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-47384 (GCVE-0-2021-47384)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:03 – Updated: 2025-06-19 12:56

Title

hwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field

Summary

In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field If driver read tmp value sufficient for (tmp & 0x08) && (!(tmp & 0x80)) && ((tmp & 0x7) == ((tmp >> 4) & 0x7)) from device then Null pointer dereference occurs. (It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers) Also lm75[] does not serve a purpose anymore after switching to devm_i2c_new_dummy_device() in w83791d_detect_subclients(). The patch fixes possible NULL pointer dereference by removing lm75[]. Found by Linux Driver Verification project (linuxtesting.org). [groeck: Dropped unnecessary continuation lines, fixed multi-line alignments]

Severity ?

5.3 (Medium)


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

CWE

CWE-noinfo Not enough information

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/6cb01fe630eaffc5a…
	https://git.kernel.org/stable/c/7c4fd5de39f273626…
	https://git.kernel.org/stable/c/746011193f44f97f8…
	https://git.kernel.org/stable/c/dd4d747ef05addab8…

Impacted products

Vendor

Product

Version

Linux

Affected: cf48d17623281c2b3185030ed23f148bd47e15de , < 6cb01fe630eaffc5a2c3f7364436caddba286623 (git)
Affected: cf48d17623281c2b3185030ed23f148bd47e15de , < 7c4fd5de39f273626a2b0f3a446d2cc85cd47616 (git)
Affected: cf48d17623281c2b3185030ed23f148bd47e15de , < 746011193f44f97f8784edcf8327c587946745fc (git)
Affected: cf48d17623281c2b3185030ed23f148bd47e15de , < dd4d747ef05addab887dc8ff0d6ab9860bbcd783 (git)

Linux

Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.4.151 , ≤ 5.4.* (semver)
Unaffected: 5.10.71 , ≤ 5.10.* (semver)
Unaffected: 5.14.10 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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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-H6GR-4677-26P9

CVE-2021-47384 (GCVE-0-2021-47384)

Tags

Sightings

Nomenclature