GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-43022 (GCVE-0-2026-43022)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:15 – Updated: 2026-05-23 16:06
VLAI
Title
Bluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists
Summary
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
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: 505ea2b295929e7be2b4e1bc86ee31cb7862fb01 , < 0ad2ce230b38cd4b3f6732cc609e270461e626e5 (git)
Affected: 505ea2b295929e7be2b4e1bc86ee31cb7862fb01 , < 2969554bcfccb5c609f6b6cd4a014933f3a66dd0 (git)
Affected: f00f36db76eb8fd10d13e80e2590f23b5beaa54d (git)
Affected: 1499f79995c7ee58e3bfeeff75f6d1b37dcda881 (git)
Affected: 357603f4d396d85fbf0045512efaf1d7f7394ed7 (git)
Affected: 6.1.120 , < 6.2 (semver)
Affected: 6.6.51 , < 6.7 (semver)
Affected: 6.8.9 , < 6.9 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0ad2ce230b38cd4b3f6732cc609e270461e626e5",
              "status": "affected",
              "version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
              "versionType": "git"
            },
            {
              "lessThan": "2969554bcfccb5c609f6b6cd4a014933f3a66dd0",
              "status": "affected",
              "version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f00f36db76eb8fd10d13e80e2590f23b5beaa54d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1499f79995c7ee58e3bfeeff75f6d1b37dcda881",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "357603f4d396d85fbf0045512efaf1d7f7394ed7",
              "versionType": "git"
            },
            {
              "lessThan": "6.2",
              "status": "affected",
              "version": "6.1.120",
              "versionType": "semver"
            },
            {
              "lessThan": "6.7",
              "status": "affected",
              "version": "6.6.51",
              "versionType": "semver"
            },
            {
              "lessThan": "6.9",
              "status": "affected",
              "version": "6.8.9",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.12",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.1.120",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.6.51",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.8.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T16:06:00.475Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0ad2ce230b38cd4b3f6732cc609e270461e626e5"
        },
        {
          "url": "https://git.kernel.org/stable/c/2969554bcfccb5c609f6b6cd4a014933f3a66dd0"
        }
      ],
      "title": "Bluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43022",
    "datePublished": "2026-05-01T14:15:25.059Z",
    "dateReserved": "2026-05-01T14:12:55.975Z",
    "dateUpdated": "2026-05-23T16:06:00.475Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43022",
      "date": "2026-09-20",
      "epss": "0.00107",
      "percentile": "0.01317"
    },
    "microsoft_vex": {
      "current_release_date": "2026-06-28T14:04:30.000Z",
      "cve": "CVE-2026-43022",
      "id": "msrc_CVE-2026-43022",
      "initial_release_date": "2026-05-02T00:00:00.000Z",
      "product_status:under_investigation": "4",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "Bluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-43022.json",
      "version": "4"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/bluetooth/hci_sync.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "0ad2ce230b38cd4b3f6732cc609e270461e626e5",
                    "status": "affected",
                    "version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "2969554bcfccb5c609f6b6cd4a014933f3a66dd0",
                    "status": "affected",
                    "version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "f00f36db76eb8fd10d13e80e2590f23b5beaa54d",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "1499f79995c7ee58e3bfeeff75f6d1b37dcda881",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "357603f4d396d85fbf0045512efaf1d7f7394ed7",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6.2",
                    "status": "affected",
                    "version": "6.1.120",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "6.7",
                    "status": "affected",
                    "version": "6.6.51",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "6.9",
                    "status": "affected",
                    "version": "6.8.9",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "net/bluetooth/hci_sync.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.9"
                  },
                  {
                    "lessThan": "6.9",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.19.*",
                    "status": "unaffected",
                    "version": "6.19.12",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.0",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "69EBA763-2018-43A0-9E04-A217634DDECB",
                    "versionEndExcluding": "6.19.12",
                    "versionStartIncluding": "6.9",
                    "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",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "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."
          }
        ],
        "id": "CVE-2026-43022",
        "lastModified": "2026-06-17T10:48:46.927",
        "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": "2026-05-01T15:16:46.483",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0ad2ce230b38cd4b3f6732cc609e270461e626e5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2969554bcfccb5c609f6b6cd4a014933f3a66dd0"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:34:43+00:00",
      "cve": "CVE-2026-43022",
      "id": "CVE-2026-43022",
      "initial_release_date": "2026-05-01T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43022.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:22:05Z",
      "cve": "CVE-2026-43022",
      "id": "CVE-2026-43022",
      "initial_release_date": "2026-05-07T02:19:47Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "424",
      "product_status:known_not_affected": "277",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43022",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43022.json",
      "version": "14"
    }
  }
}



Log in or create an account to share your comment.




Tags
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.