{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-90091",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90091",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-17T16:06:05.478Z",
    "updatedAt": "2026-10-19T08:57:49.423Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Bluetooth: L2CAP: fix race l2cap_sock_cleanup_listen() vs. put_chan",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: fix race l2cap_sock_cleanup_listen() vs. put_chan\n\nFor L2CAP sockets without owning sk->sk_socket, reading\nl2cap_pi(sk)->chan may race against concurrent l2cap_sock_kill() ->\nl2cap_sock_put_chan().  This excludes simultaneous proto_ops callbacks,\nbut access in l2cap_sock_cleanup_listen() has unsafe lockless read.\n\n [Task 1]                         [Task 2 (hdev->workqueue)]\n l2cap_sock_release(parent)       l2cap_disconn_cfm\n   l2cap_sock_cleanup_listen        l2cap_conn_del\n     bt_accept_dequeue                l2cap_chan_del\n       lock_sock(sk)                    l2cap_sock_teardown_cb\n       bt_accept_unlink\n         bt_sk(sk)->parent = NULL\n       release_sock(sk) ----------------> lock_sock(sk)\n                                          parent = /* NULL */\n     lock_sock(sk) <--------------------- release_sock(sk)\n                                          sock_set_flag(sk, SOCK_ZAPPED)\n                                      l2cap_sock_close_cb\n                                        l2cap_sock_kill(sk)\n                                          l2cap_sock_put_chan\n     chan = READ l2cap_pi(sk)->chan         l2cap_pi(sk)->chan = NULL\n     l2cap_chan_hold_unless_zero            l2cap_put_chan(chan)\n       kref_get_unless_zero(&chan->ref)\n\nTask 1 may observe NULL which causes null-ptr-deref.\n\nFix the race by taking lock_sock() in l2cap_sock_kill() to\nsynchronize with l2cap_sock_cleanup_listen().  hold_unless_zero() is not\nneeded here, l2cap_pi(sk)->chan owns reference if it is non-NULL.\n\nClarify code comments vs. locking.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "b39298044e5534612511a2ff5de03ba5f6e7a820",
              "status": "affected",
              "versionType": "git",
              "lessThan": "827de6bd2865b22aaabd554540def3b8a33018ab"
            },
            {
              "version": "8c37e4338c801ebb8cee52436c01c41e009f6e87",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7c7ac736b50fa259ed1bdddc18d79523f07c0442"
            },
            {
              "version": "84e718b6a814edc84159361f9f454a4e92ae91ae",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4f8c63fe0097c9f6ea34409f82f79b3894903d91"
            },
            {
              "version": "36da806f7fbaee56ad9e81859deec203f9728700",
              "status": "affected",
              "versionType": "git",
              "lessThan": "61d5ddbd524c715b224cbe7e9f01da4e05098b19"
            },
            {
              "version": "6fef032af0092ed5ccb767239a9ac1bc38c08a40",
              "status": "affected",
              "versionType": "git",
              "lessThan": "32a7bc6e93be36b37fe61f351d312d358195bd61"
            },
            {
              "version": "6fef032af0092ed5ccb767239a9ac1bc38c08a40",
              "status": "affected",
              "versionType": "git",
              "lessThan": "66d6ef18548ae6d7dd452b84115fc82c0a73a4ea"
            },
            {
              "version": "733e76e74e406c1d1ddc7369420dd8a47f48bb8a",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6.1.178",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.188"
            },
            {
              "version": "6.6.145",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.157"
            },
            {
              "version": "6.12.97",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.110"
            },
            {
              "version": "6.18.40",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.18.52"
            },
            {
              "version": "7.1.5",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "7.2"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "7.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "7.2"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.110",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.52",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}