GHSA-MQJM-RHM6-4854
Vulnerability from github – Published: 2026-04-03 18:31 – Updated: 2026-07-14 15:31In the Linux kernel, the following vulnerability has been resolved:
net: usb: aqc111: Do not perform PM inside suspend callback
syzbot reports "task hung in rpm_resume"
This is caused by aqc111_suspend calling the PM variant of its write_cmd routine.
The simplified call trace looks like this:
rpm_suspend() usb_suspend_both() - here udev->dev.power.runtime_status == RPM_SUSPENDING aqc111_suspend() - called for the usb device interface aqc111_write32_cmd() usb_autopm_get_interface() pm_runtime_resume_and_get() rpm_resume() - here we call rpm_resume() on our parent rpm_resume() - Here we wait for a status change that will never happen.
At this point we block another task which holds rtnl_lock and locks up the whole networking stack.
Fix this by replacing the write_cmd calls with their _nopm variants
{
"affected": [],
"aliases": [
"CVE-2026-23446"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-03T16:16:30Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: aqc111: Do not perform PM inside suspend callback\n\nsyzbot reports \"task hung in rpm_resume\"\n\nThis is caused by aqc111_suspend calling\nthe PM variant of its write_cmd routine.\n\nThe simplified call trace looks like this:\n\nrpm_suspend()\n usb_suspend_both() - here udev-\u003edev.power.runtime_status == RPM_SUSPENDING\n aqc111_suspend() - called for the usb device interface\n aqc111_write32_cmd()\n usb_autopm_get_interface()\n pm_runtime_resume_and_get()\n rpm_resume() - here we call rpm_resume() on our parent\n rpm_resume() - Here we wait for a status change that will never happen.\n\nAt this point we block another task which holds\nrtnl_lock and locks up the whole networking stack.\n\nFix this by replacing the write_cmd calls with their _nopm variants",
"id": "GHSA-mqjm-rhm6-4854",
"modified": "2026-07-14T15:31:45Z",
"published": "2026-04-03T18:31:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23446"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/069c8f5aebe4d5224cf62acc7d4b3486091c658a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3267bcb744ee8a2feabaa7ab69473f086f67fd71"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4de6a43e8ecf961feabddf0e9d6911081d2ed218"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/621f2f43741b51f62d767eb4752fbcefe2526926"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/98e8aed64614b0c199d5f0391fbe1a4331cb5773"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b87f361d41f9a7f1f6c426947ca815651c481376"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cc06ac99fd78839b2d38850785731ef131d9ae26"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d3e32a612c6391ca9b7c183aeec22b4fd24c300c"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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