GHSA-G7CW-XHG8-933G

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-30 03:37
VLAI
Details

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().

Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-53071"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-414"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:20Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp\n\nl2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding\nl2cap_chan_lock(). Every other l2cap_chan_del() caller in the file\nacquires the lock first. A remote BLE device can send a crafted\nL2CAP ECRED reconfiguration response to corrupt the channel list\nwhile another thread is iterating it.\n\nAdd l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(),\nand l2cap_chan_unlock() and l2cap_chan_put() after, matching the\npattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().",
  "id": "GHSA-g7cw-xhg8-933g",
  "modified": "2026-06-30T03:37:13Z",
  "published": "2026-06-24T18:32:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53071"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53071"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492458"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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