github - ghsa-pgcr-7vhj-26w2

GHSA-PGCR-7VHJ-26W2

Vulnerability from github – Published: 2024-10-21 18:30 – Updated: 2024-10-25 15:31

Details

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

gpiolib: Fix potential NULL pointer dereference in gpiod_get_label()

In gpiod_get_label(), it is possible that srcu_dereference_check() may return a NULL pointer, leading to a scenario where label->str is accessed without verifying if label itself is NULL.

This patch adds a proper NULL check for label before accessing label->str. The check for label->str != NULL is removed because label->str can never be NULL if label is not NULL.

This fixes the issue where the label name was being printed as (efault) when dumping the sysfs GPIO file when label == NULL.

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-2024-49941"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T18:15:15Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpiolib: Fix potential NULL pointer dereference in gpiod_get_label()\n\nIn `gpiod_get_label()`, it is possible that `srcu_dereference_check()` may\nreturn a NULL pointer, leading to a scenario where `label-\u003estr` is accessed\nwithout verifying if `label` itself is NULL.\n\nThis patch adds a proper NULL check for `label` before accessing\n`label-\u003estr`. The check for `label-\u003estr != NULL` is removed because\n`label-\u003estr` can never be NULL if `label` is not NULL.\n\nThis fixes the issue where the label name was being printed as `(efault)`\nwhen dumping the sysfs GPIO file when `label == NULL`.",
  "id": "GHSA-pgcr-7vhj-26w2",
  "modified": "2024-10-25T15:31:26Z",
  "published": "2024-10-21T18:30:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49941"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b99b5ab885993bff010ebcd93be5e511c56e28a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ee4b907d7a5d7a53b4ff7727c371ff3d44ccbbb"
    }
  ],
  "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-2024-49941 (GCVE-0-2024-49941)

Vulnerability from cvelistv5 – Published: 2024-10-21 18:02 – Updated: 2025-05-04 09:41

Summary

In the Linux kernel, the following vulnerability has been resolved: gpiolib: Fix potential NULL pointer dereference in gpiod_get_label() In `gpiod_get_label()`, it is possible that `srcu_dereference_check()` may return a NULL pointer, leading to a scenario where `label->str` is accessed without verifying if `label` itself is NULL. This patch adds a proper NULL check for `label` before accessing `label->str`. The check for `label->str != NULL` is removed because `label->str` can never be NULL if `label` is not NULL. This fixes the issue where the label name was being printed as `(efault)` when dumping the sysfs GPIO file when `label == NULL`.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/9ee4b907d7a5d7a53…
	https://git.kernel.org/stable/c/7b99b5ab885993bff…

Impacted products

Vendor

Product

Version

Linux

Affected: a86d27693066a34a29be86f394bbad847b2d1749 , < 9ee4b907d7a5d7a53b4ff7727c371ff3d44ccbbb (git)
Affected: a86d27693066a34a29be86f394bbad847b2d1749 , < 7b99b5ab885993bff010ebcd93be5e511c56e28a (git)

Linux

Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.11.3 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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                "role": "CISA Coordinator",
                "timestamp": "2024-10-22T13:37:44.721753Z",
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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-PGCR-7VHJ-26W2

CVE-2024-49941 (GCVE-0-2024-49941)

Tags

Sightings

Nomenclature