GHSA-H3HH-6RF8-4CQ6
Vulnerability from github – Published: 2026-10-18 18:31 – Updated: 2026-10-30 15:33In the Linux kernel, the following vulnerability has been resolved:
iio: buffer: serialize buffer teardown with mode claims
Buffer-mode claims hold mlock to guarantee that the device remains in buffer mode until the claim is released. Normal buffer updates take info_exist_lock followed by mlock in iio_update_buffers().
However, iio_device_unregister() disables and deactivates all buffers without taking mlock. This can invalidate buffer state, including active_scan_mask, while a buffer-mode claim is held.
Take mlock in iio_disable_all_buffers() so that unregister honors the mode-claim lifetime guarantee. The info_exist_lock -> mlock ordering matches iio_update_buffers().
{
"affected": [],
"aliases": [
"CVE-2026-98669"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-18T16:17:20Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: buffer: serialize buffer teardown with mode claims\n\nBuffer-mode claims hold mlock to guarantee that the device remains in\nbuffer mode until the claim is released. Normal buffer updates take\ninfo_exist_lock followed by mlock in iio_update_buffers().\n\nHowever, iio_device_unregister() disables and deactivates all buffers\nwithout taking mlock. This can invalidate buffer state, including\nactive_scan_mask, while a buffer-mode claim is held.\n\nTake mlock in iio_disable_all_buffers() so that unregister honors the\nmode-claim lifetime guarantee. The info_exist_lock -\u003e mlock ordering\nmatches iio_update_buffers().",
"id": "GHSA-h3hh-6rf8-4cq6",
"modified": "2026-10-30T15:33:55Z",
"published": "2026-10-18T18:31:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98669"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/261f54966ebf45ced5fe5e1fe5119c6c44e140ab"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6a728408ff522b749c2a3c7e68f44e861fa0dbfb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/84bb0fc46ccf6a545b8fdf57cda83770186ed8dd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/89f3852a28fcf7bab599280cb082baa0675536db"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b466db9e68b4741af85f6c017e2bb0a2f025053f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cebbecb26d22368440c4779f8275d790cf347177"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e63188d77e10c0951bf67da6c295f768fd1abf4b"
}
],
"schema_version": "1.4.0",
"severity": []
}
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