Linux Kernel up to 7.0-rc4 USB Device Interface rpm_suspend stack-based overflow

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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 7.0-rc4. Impacted is the function rpm_suspend of the component USB Device Interface. The manipulation leads to stack-based overflow. This vulnerability is documented as CVE-2026-23446. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 7.0-rc4. This issue affects the function rpm_suspend of the component USB Device Interface. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2026-23446 since 01/13/2026. The exploitation is known to be easy. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 304960 (Linux Distros Unpatched Vulnerability : CVE-2026-23446), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.167, 6.6.130, 6.12.78, 6.18.20, 6.19.10 or 7.0-rc5 eliminates this vulnerability. Applying the patch 621f2f43741b51f62d767eb4752fbcefe2526926/4de6a43e8ecf961feabddf0e9d6911081d2ed218/3267bcb744ee8a2feabaa7ab69473f086f67fd71/d3e32a612c6391ca9b7c183aeec22b4fd24c300c/98e8aed64614b0c199d5f0391fbe1a4331cb5773/069c8f5aebe4d5224cf62acc7d4b3486091c658a is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (304960), EUVD (EUVD-2026-18692) and CERT Bund (WID-SEC-2026-0985). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • Microsoft Azure Linux

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 304960
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23446

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.167/6.6.130/6.12.78/6.18.20/6.19.10/7.0-rc5
Patch: 621f2f43741b51f62d767eb4752fbcefe2526926/4de6a43e8ecf961feabddf0e9d6911081d2ed218/3267bcb744ee8a2feabaa7ab69473f086f67fd71/d3e32a612c6391ca9b7c183aeec22b4fd24c300c/98e8aed64614b0c199d5f0391fbe1a4331cb5773/069c8f5aebe4d5224cf62acc7d4b3486091c658a

Timelineinfo

01/13/2026 CVE reserved
04/03/2026 +79 days Advisory disclosed
04/03/2026 +0 days VulDB entry created
07/17/2026 +104 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23446 (🔒)
GCVE (CVE): GCVE-0-2026-23446
GCVE (VulDB): GCVE-100-355151
EUVD: 🔒
CERT Bund: WID-SEC-2026-0985 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/03/2026 18:13
Updated: 07/17/2026 01:24
Changes: 04/03/2026 18:13 (59), 04/08/2026 14:47 (2), 04/19/2026 21:50 (1), 05/11/2026 19:48 (7), 06/25/2026 08:08 (1), 07/17/2026 01:24 (11)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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