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CVE-2022-49821 (GCVE-0-2022-49821)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2026-05-11 19:07
VLAI
Title
mISDN: fix possible memory leak in mISDN_dsp_element_register()
Summary
In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible memory leak in mISDN_dsp_element_register() Afer commit 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array"), the name of device is allocated dynamically, use put_device() to give up the reference, so that the name can be freed in kobject_cleanup() when the refcount is 0. The 'entry' is going to be freed in mISDN_dsp_dev_release(), so the kfree() is removed. list_del() is called in mISDN_dsp_dev_release(), so it need be initialized.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1fa5ae857bb14f6046205171d98506d8112dd74e , < bbd53d05c4c892080ef3b617eff4f57903acecb9 (git)
Affected: 1fa5ae857bb14f6046205171d98506d8112dd74e , < b119bedbefb7dd9ed8bf8cb9f1056504250d610e (git)
Affected: 1fa5ae857bb14f6046205171d98506d8112dd74e , < 727ed7d28348c026c7ef4d852f3d0e5054d376e8 (git)
Affected: 1fa5ae857bb14f6046205171d98506d8112dd74e , < 0f2c681900a01e3f23789bca26d88268c3d5b51d (git)
Affected: 1fa5ae857bb14f6046205171d98506d8112dd74e , < 083a2c9ef82e184bdf0b9f9a1e5fc38d32afbb47 (git)
Affected: 1fa5ae857bb14f6046205171d98506d8112dd74e , < 7a05e3929668c8cfef495c69752a9e91fac4878f (git)
Affected: 1fa5ae857bb14f6046205171d98506d8112dd74e , < d4b8394725079670be309f9a35ad88a8cbbaaefd (git)
Affected: 1fa5ae857bb14f6046205171d98506d8112dd74e , < 98a2ac1ca8fd6eca6867726fe238d06e75eb1acd (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.30
Unaffected: 0 , < 2.6.30 (semver)
Unaffected: 4.9.334 , ≤ 4.9.* (semver)
Unaffected: 4.14.300 , ≤ 4.14.* (semver)
Unaffected: 4.19.267 , ≤ 4.19.* (semver)
Unaffected: 5.4.225 , ≤ 5.4.* (semver)
Unaffected: 5.10.156 , ≤ 5.10.* (semver)
Unaffected: 5.15.80 , ≤ 5.15.* (semver)
Unaffected: 6.0.10 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mISDN: corrige posible p\u00e9rdida de memoria en mISDN_dsp_element_register() Despu\u00e9s de la confirmaci\u00f3n 1fa5ae857bb1 (\"n\u00facleo del controlador: deshacerse de la matriz de cadenas bus_id del dispositivo struct\"), el nombre del dispositivo se asigna din\u00e1micamente, use put_device() para renunciar a la referencia, de modo que el nombre se pueda liberar en kobject_cleanup() cuando refcount sea 0. La \u0027entrada\u0027 se liberar\u00e1 en mISDN_dsp_dev_release(), por lo que se elimina kfree(). list_del() se llama en mISDN_dsp_dev_release(), por lo que necesita inicializarse."
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        "id": "CVE-2022-49821",
        "lastModified": "2026-06-17T05:19:13.737",
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            ],
            "url": "https://git.kernel.org/stable/c/0f2c681900a01e3f23789bca26d88268c3d5b51d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/727ed7d28348c026c7ef4d852f3d0e5054d376e8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/7a05e3929668c8cfef495c69752a9e91fac4878f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/98a2ac1ca8fd6eca6867726fe238d06e75eb1acd"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/b119bedbefb7dd9ed8bf8cb9f1056504250d610e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/bbd53d05c4c892080ef3b617eff4f57903acecb9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d4b8394725079670be309f9a35ad88a8cbbaaefd"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-401"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:18:30+00:00",
      "cve": "CVE-2022-49821",
      "id": "CVE-2022-49821",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mISDN: fix possible memory leak in mISDN_dsp_element_register()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49821.json",
      "version": "3"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.