CVE-2024-56654
Vulnerability from cvelistv5
Published
2024-12-27 15:06
Modified
2025-01-20 06:25
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating The usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is not safe since for the most part entries fetched this way shall be treated as rcu_dereference: Note that the value returned by rcu_dereference() is valid only within the enclosing RCU read-side critical section [1]_. For example, the following is **not** legal:: rcu_read_lock(); p = rcu_dereference(head.next); rcu_read_unlock(); x = p->address; /* BUG!!! */ rcu_read_lock(); y = p->data; /* BUG!!! */ rcu_read_unlock();
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0108132d7d76d884e443d18b4f067cdf2811911bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/581dd2dc168fe0ed2a7a5534a724f0d3751c93aePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f9ecc90b5d501b3a5a62d0685d5104f934bb0104Patch
Impacted products
Vendor Product Version
Linux Linux Version: a0bfde167b506423111ddb8cd71930497a40fc54
Version: a0bfde167b506423111ddb8cd71930497a40fc54
Version: a0bfde167b506423111ddb8cd71930497a40fc54
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   Linux Linux Version: 6.6
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0108132d7d76d884e443d18b4f067cdf2811911b",
              "status": "affected",
              "version": "a0bfde167b506423111ddb8cd71930497a40fc54",
              "versionType": "git"
            },
            {
              "lessThan": "f9ecc90b5d501b3a5a62d0685d5104f934bb0104",
              "status": "affected",
              "version": "a0bfde167b506423111ddb8cd71930497a40fc54",
              "versionType": "git"
            },
            {
              "lessThan": "581dd2dc168fe0ed2a7a5534a724f0d3751c93ae",
              "status": "affected",
              "version": "a0bfde167b506423111ddb8cd71930497a40fc54",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.67",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: Fix using rcu_read_(un)lock while iterating\n\nThe usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is\nnot safe since for the most part entries fetched this way shall be\ntreated as rcu_dereference:\n\n\tNote that the value returned by rcu_dereference() is valid\n\tonly within the enclosing RCU read-side critical section [1]_.\n\tFor example, the following is **not** legal::\n\n\t\trcu_read_lock();\n\t\tp = rcu_dereference(head.next);\n\t\trcu_read_unlock();\n\t\tx = p-\u003eaddress;\t/* BUG!!! */\n\t\trcu_read_lock();\n\t\ty = p-\u003edata;\t/* BUG!!! */\n\t\trcu_read_unlock();"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-01-20T06:25:08.163Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0108132d7d76d884e443d18b4f067cdf2811911b"
        },
        {
          "url": "https://git.kernel.org/stable/c/f9ecc90b5d501b3a5a62d0685d5104f934bb0104"
        },
        {
          "url": "https://git.kernel.org/stable/c/581dd2dc168fe0ed2a7a5534a724f0d3751c93ae"
        }
      ],
      "title": "Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-56654",
    "datePublished": "2024-12-27T15:06:18.224Z",
    "dateReserved": "2024-12-27T15:00:39.841Z",
    "dateUpdated": "2025-01-20T06:25:08.163Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-56654\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-27T15:15:25.237\",\"lastModified\":\"2025-01-06T22:33:09.937\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: hci_event: Fix using rcu_read_(un)lock while iterating\\n\\nThe usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is\\nnot safe since for the most part entries fetched this way shall be\\ntreated as rcu_dereference:\\n\\n\\tNote that the value returned by rcu_dereference() is valid\\n\\tonly within the enclosing RCU read-side critical section [1]_.\\n\\tFor example, the following is **not** legal::\\n\\n\\t\\trcu_read_lock();\\n\\t\\tp = rcu_dereference(head.next);\\n\\t\\trcu_read_unlock();\\n\\t\\tx = p-\u003eaddress;\\t/* BUG!!! */\\n\\t\\trcu_read_lock();\\n\\t\\ty = p-\u003edata;\\t/* BUG!!! */\\n\\t\\trcu_read_unlock();\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: hci_event: Se solucion\u00f3 el uso de rcu_read_(un)lock durante la iteraci\u00f3n El uso de rcu_read_(un)lock mientras se est\u00e1 dentro de list_for_each_entry_rcu no es seguro ya que en la mayor parte de los casos las entradas obtenidas de esta manera se tratar\u00e1n como rcu_dereference: Tenga en cuenta que el valor devuelto por rcu_dereference() solo es v\u00e1lido dentro de la secci\u00f3n cr\u00edtica del lado de lectura de RCU [1]_. Por ejemplo, lo siguiente **no** es legal:: rcu_read_lock(); p = rcu_dereference(head.next); rcu_read_unlock(); x = p-\u0026gt;address; /* \u00a1ERROR! */ rcu_read_lock(); y = p-\u0026gt;data; /* \u00a1ERROR! */ rcu_read_unlock();\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4.16\",\"versionEndExcluding\":\"6.5\",\"matchCriteriaId\":\"A5099559-2D15-42A5-A561-71B34FEFF36F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.5.3\",\"versionEndExcluding\":\"6.6.67\",\"matchCriteriaId\":\"F1CE7364-7396-4F17-8A39-45AB0F1A689E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.6\",\"matchCriteriaId\":\"0CB1A9BB-F95E-43DD-A2FD-147912FD91E5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"62567B3C-6CEE-46D0-BC2E-B3717FBF7D13\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"5A073481-106D-4B15-B4C7-FB0213B8E1D4\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0108132d7d76d884e443d18b4f067cdf2811911b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/581dd2dc168fe0ed2a7a5534a724f0d3751c93ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f9ecc90b5d501b3a5a62d0685d5104f934bb0104\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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