CVE-2026-23446

Networking stack hang via suspend callback deadlock

Published Apr 3, 2026 · Updated Apr 3, 2026

Deadlock in the aqc111 USB network driver in the Linux Kernel allows local users to hang the networking stack during device suspension. The aqc111_suspend callback invokes power-management write routines while its parent USB device is already suspending, causing rpm_resume to wait indefinitely. Exploitation requires an affected kernel with the aqc111 driver and a suspend transition; the stalled path blocks a task holding rtnl_lock and interrupts networking.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deadlock in the aqc111 USB network driver in the Linux Kernel allows local users to hang the networking stack during device suspension. The aqc111_suspend callback invokes power-management write routines while its parent USB device is already suspending, causing rpm_resume to wait indefinitely. Exploitation requires an affected kernel with the aqc111 driver and a suspend transition; the stalled path blocks a task holding rtnl_lock and interrupts networking.

The record

CVE
CVE-2026-23446
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0
  2. Affected versionversion=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <069c8f5aebe4d5224cf62acc7d4b3486091c658a
  3. Affected versionversion=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <3267bcb744ee8a2feabaa7ab69473f086f67fd71
  4. Affected versionversion=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <4de6a43e8ecf961feabddf0e9d6911081d2ed218
  5. Affected versionversion=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <621f2f43741b51f62d767eb4752fbcefe2526926
  6. Affected versionversion=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <98e8aed64614b0c199d5f0391fbe1a4331cb5773
  7. Affected versionversion=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <d3e32a612c6391ca9b7c183aeec22b4fd24c300c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.0; version=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <069c8f5aebe4d5224cf62acc7d4b3486091c658a; version=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <3267bcb744ee8a2feabaa7ab69473f086f67fd71; version=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <4de6a43e8ecf961feabddf0e9d6911081d2ed218; version=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <621f2f43741b51f62d767eb4752fbcefe2526926; version=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <98e8aed64614b0c199d5f0391fbe1a4331cb5773; version=e58ba4544c7771591d1e3157bc01b4a8e4d1c3fc <d3e32a612c6391ca9b7c183aeec22b4fd24c300c

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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