GHSA-8H46-FFJ6-V52H

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:32
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: bnep: Fix UAF read of dev->name

bnep_add_connection() needs to keep holding the bnep_session_sem while reading dev->name (just like bnep_get_connlist() does); otherwise the bnep_session() thread can concurrently free the net_device, which can for example be triggered by a concurrent bnep_del_connection().

(This UAF is fairly uninteresting from a security perspective; calling bnep_add_connection() requires passing a capable(CAP_NET_ADMIN) check. It also requires completely tearing down a netdev during a fairly tight race window.)

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-2026-64178"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:18:00Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bnep: Fix UAF read of dev-\u003ename\n\nbnep_add_connection() needs to keep holding the bnep_session_sem while\nreading dev-\u003ename (just like bnep_get_connlist() does); otherwise the\nbnep_session() thread can concurrently free the net_device, which can for\nexample be triggered by a concurrent bnep_del_connection().\n\n(This UAF is fairly uninteresting from a security perspective;\ncalling bnep_add_connection() requires passing a capable(CAP_NET_ADMIN)\ncheck. It also requires completely tearing down a netdev during a fairly\ntight race window.)",
  "id": "GHSA-8h46-ffj6-v52h",
  "modified": "2026-07-20T15:32:02Z",
  "published": "2026-07-19T18:31:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64178"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4907596f25b1720fa948371ac5f6c1f8da10a5bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5506aec795135cdd4cbf4e845929155663b25055"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/59e932ded949fa6f0340bf7c6d7818f962fa4fd2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/915a92182e2cda9cd7d2479020a44c6eda986f7c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a75bbcb10cb21acc169b785e9804f57d97873a9c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b21805258d7e926adfd455fc820a447b90da3b82"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e7578529b97e5d4e439cf8f3e637c2303015338f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe69f634b076ae3ca81c5a5b845d9bba527036f7"
    }
  ],
  "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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