GHSA-PC9G-8WGV-JV4J
Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31In the Linux kernel, the following vulnerability has been resolved:
IB/mlx4: Fix use-after-free on pkey sysfs registration failure
register_pkey_tree() ignores errors from register_one_pkey_tree() and continues registering the remaining slaves. The per-slave error path has already released the pkey parent kobjects, but their pointers remain stored in the device. A later device cleanup therefore passes the stale pointers to kobject_put(), causing a use-after-free.
Clear the parent pointers after releasing a failed slave tree and skip unregistered trees during device cleanup. This preserves the existing best-effort registration behavior while preventing a second cleanup of the failed tree.
{
"affected": [],
"aliases": [
"CVE-2026-98217"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-06T09:18:08Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx4: Fix use-after-free on pkey sysfs registration failure\n\nregister_pkey_tree() ignores errors from register_one_pkey_tree() and\ncontinues registering the remaining slaves. The per-slave error path has\nalready released the pkey parent kobjects, but their pointers remain\nstored in the device. A later device cleanup therefore passes the stale\npointers to kobject_put(), causing a use-after-free.\n\nClear the parent pointers after releasing a failed slave tree and skip\nunregistered trees during device cleanup. This preserves the existing\nbest-effort registration behavior while preventing a second cleanup of\nthe failed tree.",
"id": "GHSA-pc9g-8wgv-jv4j",
"modified": "2026-10-06T09:31:31Z",
"published": "2026-10-06T09:31:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98217"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0c3482e965b18bc242e54e899d1c4d391ca8e5e3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1af874e9f4ce22ccf8b10ab5462f32c70d3be21a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/734f066933484f6c7cedea0312763249beed5845"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/791471421d848ce13e84f4b21c9e19973d471c4e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a07bee32127d7c4cd3b1bb9a088e21d0c93634c9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ced1186fea7c77e16681c7ef4802897885989c3b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cf20d7476754c00eec04ae23d3e929de33ce0345"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ffb80872617b5f9b3dd1536ec2909029fa66f228"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
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|---|
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