GHSA-JPRM-RCXH-4JGP

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-29 09:30
VLAI
Details

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

driver core: use READ_ONCE() for dev->driver in dev_has_sync_state()

dev_has_sync_state() reads dev->driver twice without holding device_lock() -- once for the NULL check and once to dereference ->sync_state. Some callers only hold device_links_write_lock, which doesn't prevent a concurrent unbind from clearing dev->driver via device_unbind_cleanup().

Fix it by reading dev->driver exactly once with READ_ONCE(), pairing with the WRITE_ONCE() in device_set_driver().

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-80677"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:52Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndriver core: use READ_ONCE() for dev-\u003edriver in dev_has_sync_state()\n\ndev_has_sync_state() reads dev-\u003edriver twice without holding\ndevice_lock() -- once for the NULL check and once to dereference\n-\u003esync_state. Some callers only hold device_links_write_lock, which\ndoesn\u0027t prevent a concurrent unbind from clearing dev-\u003edriver via\ndevice_unbind_cleanup().\n\nFix it by reading dev-\u003edriver exactly once with READ_ONCE(), pairing\nwith the WRITE_ONCE() in device_set_driver().",
  "id": "GHSA-jprm-rcxh-4jgp",
  "modified": "2026-08-29T09:30:28Z",
  "published": "2026-08-28T09:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80677"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/358697929351f619143f59c6a8a15a4994748b79"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51b3e1de53ee5b7775c7ff90e67fdb2665fce938"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e79e0180515b31b2e2244dc3d256fd8b5a07021"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/860885fcd2611bca8c28dac8b2c1c7ff160f763e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89789e4c141904506163dcb91c7289a074573931"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b0f4082a09760939588135d60a8e9cc994bfa3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc77f0d91e3214e4292208f02a1dc09a31f9aac7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9506871a8ea304cde48ff4a57226df2aadddae3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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