Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

{
  "id": "b179007d939714d0d333417d5b1229be06a55e2a632094b96c188468c9a03001",
  "url": "https://osv.dev/vulnerability/CVE-2026-53071",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file acquires the lock first. A remote BLE device can send a crafted L2CAP ECRED reconfiguration response to corrupt the channel list while another thread is iterating it. Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(), and l2cap_chan_unlock() and l2cap_chan_put() after, matching the pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().",
    "evidence": "osv:CVE-2026-53071",
    "products": [
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          "value": "Kernel",
          "evidence": "/affected/1/package/name"
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        "prerequisites": [],
        "fixed_versions": [
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    "severity": "high",
    "structured": {
      "id": "CVE-2026-53071",
      "aliases": [
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      "metrics": [
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          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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                  "fixed": "0ccd75c51f620374086f359e906917676e699a1c"
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      "modified": "2026-10-28T02:30:31.021877299Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c",
        "https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c",
        "https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab",
        "https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e",
        "https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917",
        "https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae",
        "https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c",
        "https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14",
        "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json",
        "https://access.redhat.com/errata/RHSA-2026:42550",
        "https://access.redhat.com/errata/RHSA-2026:42552",
        "https://access.redhat.com/errata/RHSA-2026:42919",
        "https://access.redhat.com/errata/RHSA-2026:43307",
        "https://access.redhat.com/errata/RHSA-2026:65710",
        "https://access.redhat.com/errata/RHSA-2026:65711",
        "https://access.redhat.com/errata/RHSA-2026:67721",
        "https://access.redhat.com/errata/RHSA-2026:67723",
        "https://access.redhat.com/security/cve/CVE-2026-53071",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53071.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53071",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2492458",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
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        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53071.json"
      }
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        "value": "CVE-2026-53071",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498210,
  "published_at": "2026-06-24T16:30:12.694+00:00"
}