GHSA-GWRG-CCHR-Q69G
Vulnerability from github – Published: 2026-09-24 18:31 – Updated: 2026-09-24 18:31In the Linux kernel, the following vulnerability has been resolved:
usbip: vhci_hcd: fix NULL deref in status_show_vhci
platform_get_drvdata() can return NULL if a VHCI host controller's probe failed (e.g. due to USB bus number exhaustion). status_show_vhci() checked for a NULL pdev but not for a NULL hcd returned by platform_get_drvdata(). Passing NULL to hcd_to_vhci_hcd() does not return NULL - it returns a pointer offset of 0x260, causing a NULL pointer dereference when that value is subsequently dereferenced.
Add a NULL check on hcd before calling hcd_to_vhci_hcd(). Move status_show_not_ready() above status_show_vhci() to make it callable from the new error path without a forward declaration.
{
"affected": [],
"aliases": [
"CVE-2026-97484"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-24T17:17:25Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusbip: vhci_hcd: fix NULL deref in status_show_vhci\n\nplatform_get_drvdata() can return NULL if a VHCI host controller\u0027s\nprobe failed (e.g. due to USB bus number exhaustion). status_show_vhci()\nchecked for a NULL pdev but not for a NULL hcd returned by\nplatform_get_drvdata(). Passing NULL to hcd_to_vhci_hcd() does not\nreturn NULL - it returns a pointer offset of 0x260, causing a NULL\npointer dereference when that value is subsequently dereferenced.\n\nAdd a NULL check on hcd before calling hcd_to_vhci_hcd(). Move\nstatus_show_not_ready() above status_show_vhci() to make it callable\nfrom the new error path without a forward declaration.",
"id": "GHSA-gwrg-cchr-q69g",
"modified": "2026-09-24T18:31:34Z",
"published": "2026-09-24T18:31:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97484"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/046a94fdb02eb1df86c8fa4614104ff801ba3ab7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bc150783542ba2e7c1257d1299c6f3269bdba270"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dacd7c317ba12e035653c28a0eaaf23d91abc073"
}
],
"schema_version": "1.4.0",
"severity": []
}
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