← Back to CVE Explorer

CVE-2026-43022

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists hci_cmd_sync_queue_once() needs to indicate whether a queue item was added, so caller can know if callbacks are called, so it can avoid leaking resources. Change the function to return -EEXIST if queue item already exists. Modify all callsites to handle that.

Severity
MEDIUM
CVSS score
5.5 (v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-05-01 15:16:46.483000
Last modified
2026-10-30 13:18:44.537000
View original CVE JSON
{
  "id": "CVE-2026-43022",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-05-01T15:16:46.483",
  "lastModified": "2026-10-30T13:18:44.537",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists\n\nhci_cmd_sync_queue_once() needs to indicate whether a queue item was\nadded, so caller can know if callbacks are called, so it can avoid\nleaking resources.\n\nChange the function to return -EEXIST if queue item already exists.\n\nModify all callsites to handle that."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "f00f36db76eb8fd10d13e80e2590f23b5beaa54d",
              "lessThan": "da531f7108218ab6a779861e4646562fc769c9b3",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "1499f79995c7ee58e3bfeeff75f6d1b37dcda881",
              "lessThan": "dfee8da127bafa46530b72347bce3ccae736296d",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
              "lessThan": "799e2e5fbf3f14874b5c6cc289a0dd68b2ca1979",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
              "lessThan": "5cfa4f537a056c91ac6c09bc3ab58a4455217df7",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
              "lessThan": "0ad2ce230b38cd4b3f6732cc609e270461e626e5",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
              "lessThan": "2969554bcfccb5c609f6b6cd4a014933f3a66dd0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "357603f4d396d85fbf0045512efaf1d7f7394ed7",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "6.1.120",
              "lessThan": "6.1.191",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.6.51",
              "lessThan": "6.6.160",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.8.9",
              "lessThan": "6.9",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.9",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.9",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.114",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.57",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.19.12",
              "lessThanOrEqual": "6.19.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.0",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "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": "[email protected]",
      "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": "6.9",
              "versionEndExcluding": "6.19.12",
              "matchCriteriaId": "69EBA763-2018-43A0-9E04-A217634DDECB"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1.120:*:*:*:*:*:*:*",
              "matchCriteriaId": "52A2191E-D354-4732-9A39-C4059434873F"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.6.51:*:*:*:*:*:*:*",
              "matchCriteriaId": "C599A8CC-8612-442F-9C8A-A2AC38388756"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.8.9:*:*:*:*:*:*:*",
              "matchCriteriaId": "76C237AC-883E-439D-8ADF-3ABB51821E39"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0ad2ce230b38cd4b3f6732cc609e270461e626e5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://git.kernel.org/stable/c/2969554bcfccb5c609f6b6cd4a014933f3a66dd0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://git.kernel.org/stable/c/5cfa4f537a056c91ac6c09bc3ab58a4455217df7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/799e2e5fbf3f14874b5c6cc289a0dd68b2ca1979",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/da531f7108218ab6a779861e4646562fc769c9b3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dfee8da127bafa46530b72347bce3ccae736296d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}