FKIE_CVE-2026-53364

Vulnerability from fkie_nvd - Published: 2026-07-13 18:16 - Updated: 2026-08-03 10:16
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate() hci_le_big_terminate() allocates iso_list_data via kzalloc_obj but returns 0 without freeing it when neither pa_sync_term nor big_sync_term flags are set after evaluating the PA and BIG sync connection state. This early-return path was introduced when hci_le_big_terminate() was refactored to take struct hci_conn instead of raw u8 parameters, adding PA/BIG flag evaluation logic. The existing kfree() on hci_cmd_sync_queue failure does not cover this path.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/488e808e3fa53200f3ef3324c45fcba4ae9f4972
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a59d4f4217e6200ca9180643e5738a87d3fa8be0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bfa9d28960ed677d556bdf097073bc3129686229Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e6b78019664dfe37c3dc707f50e7b453d6c7726dPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel 7.1
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_conn.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "488e808e3fa53200f3ef3324c45fcba4ae9f4972",
              "status": "affected",
              "version": "a8444cca514edd4e47e322926b10516a5a6d7016",
              "versionType": "git"
            },
            {
              "lessThan": "e6b78019664dfe37c3dc707f50e7b453d6c7726d",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "a7bcffc673de219af2698fbb90627016233de67b",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "a7bcffc673de219af2698fbb90627016233de67b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "087812a6119b4cd5c9d658b48aee40a25707a1c6",
              "versionType": "git"
            },
            {
              "lessThan": "6.17",
              "status": "affected",
              "version": "6.16.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_conn.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "85755E6B-CD50-44C1-9A10-FF4C55D8FAF1",
              "versionEndExcluding": "6.18.35",
              "versionStartIncluding": "6.16.4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9161A938-0FA8-44BC-95FE-C5A271601AB3",
              "versionEndExcluding": "7.0.12",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390",
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            {
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              "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6",
              "vulnerable": true
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              "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97",
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          "negate": false,
          "operator": "OR"
        }
      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: Fix memory leak in hci_le_big_terminate()\n\nhci_le_big_terminate() allocates iso_list_data via kzalloc_obj but\nreturns 0 without freeing it when neither pa_sync_term nor big_sync_term\nflags are set after evaluating the PA and BIG sync connection state.\n\nThis early-return path was introduced when hci_le_big_terminate() was\nrefactored to take struct hci_conn instead of raw u8 parameters, adding\nPA/BIG flag evaluation logic. The existing kfree() on hci_cmd_sync_queue\nfailure does not cover this path."
    }
  ],
  "id": "CVE-2026-53364",
  "lastModified": "2026-08-03T10:16:30.547",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-07-13T18:16:28.297",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/488e808e3fa53200f3ef3324c45fcba4ae9f4972"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a59d4f4217e6200ca9180643e5738a87d3fa8be0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bfa9d28960ed677d556bdf097073bc3129686229"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/e6b78019664dfe37c3dc707f50e7b453d6c7726d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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