CVE-2026-98462 (GCVE-0-2026-98462)
Vulnerability from cvelistv5
Published
2026-10-18 15:15
Modified
2026-10-19 09:19
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fix CIS hold ownership on reuse Commit 69997d50ec57 ("Bluetooth: ISO: handle bound CIS cleanup via hci_conn") made hci_bind_cis() and hci_connect_cis() return a connection with one hold for the ISO layer. hci_bind_cis() currently takes that hold only after configuring a CIS, so its BT_CONNECTED and matching BT_BOUND paths return a bare lookup result. Its configuration failure path can likewise call hci_conn_drop() before taking a hold. Take the hold before any state-dependent return or configuration error so every successful return follows the documented ownership contract and every error drop is balanced. hci_connect_cis() also assumes hci_conn_link() always takes a new CIS hold before dropping the one returned by hci_bind_cis(). However, the helper returns an existing link without taking another hold. In that case, preserve the CIS hold for the caller and drop the redundant LE hold because the existing link already owns its parent hold. Returning early also avoids changing an existing CIS back to BT_CONNECT.
References
Impacted products
Vendor Product Version
Linux Linux Version: 69997d50ec574be816b4ee8f9cee52ebbd53f8bd
Version: 69997d50ec574be816b4ee8f9cee52ebbd53f8bd
Version: 69997d50ec574be816b4ee8f9cee52ebbd53f8bd
Version: 69997d50ec574be816b4ee8f9cee52ebbd53f8bd
Version: 69997d50ec574be816b4ee8f9cee52ebbd53f8bd
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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": "10f959cb435217b4b407864e5be0eb779e389490",
              "status": "affected",
              "version": "69997d50ec574be816b4ee8f9cee52ebbd53f8bd",
              "versionType": "git"
            },
            {
              "lessThan": "072bc8659f22566083f8eef7dc5903bbcaf7804a",
              "status": "affected",
              "version": "69997d50ec574be816b4ee8f9cee52ebbd53f8bd",
              "versionType": "git"
            },
            {
              "lessThan": "3ff5a8d949e3a2a435d0a5ee05074cd371b0158a",
              "status": "affected",
              "version": "69997d50ec574be816b4ee8f9cee52ebbd53f8bd",
              "versionType": "git"
            },
            {
              "lessThan": "947eb2f41f70d371eb16897ee4e8e32bff73b476",
              "status": "affected",
              "version": "69997d50ec574be816b4ee8f9cee52ebbd53f8bd",
              "versionType": "git"
            },
            {
              "lessThan": "e06d549fcd4a0ba381ed67ddf1ab3c7a6ca4314c",
              "status": "affected",
              "version": "69997d50ec574be816b4ee8f9cee52ebbd53f8bd",
              "versionType": "git"
            }
          ]
        },
        {
          "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": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.55",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.9",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fix CIS hold ownership on reuse\n\nCommit 69997d50ec57 (\"Bluetooth: ISO: handle bound CIS cleanup via\nhci_conn\") made hci_bind_cis() and hci_connect_cis() return a\nconnection with one hold for the ISO layer.  hci_bind_cis() currently\ntakes that hold only after configuring a CIS, so its BT_CONNECTED and\nmatching BT_BOUND paths return a bare lookup result.  Its configuration\nfailure path can likewise call hci_conn_drop() before taking a hold.\n\nTake the hold before any state-dependent return or configuration error\nso every successful return follows the documented ownership contract\nand every error drop is balanced.\n\nhci_connect_cis() also assumes hci_conn_link() always takes a new CIS\nhold before dropping the one returned by hci_bind_cis().  However, the\nhelper returns an existing link without taking another hold.  In that\ncase, preserve the CIS hold for the caller and drop the redundant LE\nhold because the existing link already owns its parent hold.  Returning\nearly also avoids changing an existing CIS back to BT_CONNECT."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:19:59.841Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/10f959cb435217b4b407864e5be0eb779e389490"
        },
        {
          "url": "https://git.kernel.org/stable/c/072bc8659f22566083f8eef7dc5903bbcaf7804a"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ff5a8d949e3a2a435d0a5ee05074cd371b0158a"
        },
        {
          "url": "https://git.kernel.org/stable/c/947eb2f41f70d371eb16897ee4e8e32bff73b476"
        },
        {
          "url": "https://git.kernel.org/stable/c/e06d549fcd4a0ba381ed67ddf1ab3c7a6ca4314c"
        }
      ],
      "title": "Bluetooth: hci_conn: fix CIS hold ownership on reuse",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98462",
    "datePublished": "2026-10-18T15:15:11.696Z",
    "dateReserved": "2026-09-25T10:25:14.350Z",
    "dateUpdated": "2026-10-19T09:19:59.841Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.