CVE-2026-23446 PUBLISHED

net: usb: aqc111: Do not perform PM inside suspend callback

Assigner: Linux
Reserved: 13.01.2026 Published: 03.04.2026 Updated: 03.04.2026

In 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

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc to 621f2f43741b51f62d767eb4752fbcefe2526926 (excl.)
  • affected from e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc to 4de6a43e8ecf961feabddf0e9d6911081d2ed218 (excl.)
  • affected from e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc to 3267bcb744ee8a2feabaa7ab69473f086f67fd71 (excl.)
  • affected from e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc to d3e32a612c6391ca9b7c183aeec22b4fd24c300c (excl.)
  • affected from e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc to 98e8aed64614b0c199d5f0391fbe1a4331cb5773 (excl.)
  • affected from e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc to 069c8f5aebe4d5224cf62acc7d4b3486091c658a (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.0 is affected
  • unaffected from 0 to 5.0 (excl.)
  • unaffected from 6.1.167 to 6.1.* (incl.)
  • unaffected from 6.6.130 to 6.6.* (incl.)
  • unaffected from 6.12.78 to 6.12.* (incl.)
  • unaffected from 6.18.20 to 6.18.* (incl.)
  • unaffected from 6.19.10 to 6.19.* (incl.)
  • unaffected from 7.0-rc5 to * (incl.)

References