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

Vulnerability from cvelistv5 – Published: 2024-10-21 18:02 – Updated: 2026-05-11 20:42
VLAI
Title
gpiolib: Fix potential NULL pointer dereference in gpiod_get_label()
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.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 13:37 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a86d27693066a34a29be86f394bbad847b2d1749 , < 9ee4b907d7a5d7a53b4ff7727c371ff3d44ccbbb (git)
Affected: a86d27693066a34a29be86f394bbad847b2d1749 , < 7b99b5ab885993bff010ebcd93be5e511c56e28a (git)
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Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.11.3 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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              "value": "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`."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T20:42:23.728Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/9ee4b907d7a5d7a53b4ff7727c371ff3d44ccbbb"
            },
            {
              "url": "https://git.kernel.org/stable/c/7b99b5ab885993bff010ebcd93be5e511c56e28a"
            }
          ],
          "title": "gpiolib: Fix potential NULL pointer dereference in gpiod_get_label()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-49941",
        "datePublished": "2024-10-21T18:02:00.361Z",
        "dateReserved": "2024-10-21T12:17:06.043Z",
        "dateUpdated": "2026-05-11T20:42:23.728Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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