Linux Kernel up to 6.6.121/6.12.66/6.18.6/6.19-rc5 qcom-qusb2 pm_runtime_enable null pointer dereference

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Summaryinfo

A vulnerability was found in Linux Kernel up to 6.6.121/6.12.66/6.18.6/6.19-rc5 and classified as critical. This impacts the function pm_runtime_enable of the component qcom-qusb2. Executing a manipulation can lead to null pointer dereference. This vulnerability is registered as CVE-2025-71193. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.121/6.12.66/6.18.6/6.19-rc5. It has been declared as critical. This vulnerability affects the function pm_runtime_enable of the component qcom-qusb2. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: phy: qcom-qusb2: Fix NULL pointer dereference on early suspend Enabling runtime PM before attaching the QPHY instance as driver data can lead to a NULL pointer dereference in runtime PM callbacks that expect valid driver data. There is a small window where the suspend callback may run after PM runtime enabling and before runtime forbid. This causes a sporadic crash during boot: ``` Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a1 [...] CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted 6.16.7+ #116 PREEMPT Workqueue: pm pm_runtime_work pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : qusb2_phy_runtime_suspend+0x14/0x1e0 [phy_qcom_qusb2] lr : pm_generic_runtime_suspend+0x2c/0x44 [...] ``` Attach the QPHY instance as driver data before enabling runtime PM to prevent NULL pointer dereference in runtime PM callbacks. Reorder pm_runtime_enable() and pm_runtime_forbid() to prevent a short window where an unnecessary runtime suspend can occur. Use the devres-managed version to ensure PM runtime is symmetrically disabled during driver removal for proper cleanup.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2025-71193 since 01/31/2026. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 297892 (Linux Distros Unpatched Vulnerability : CVE-2025-71193), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.122, 6.12.67, 6.18.7 or 6.19-rc6 eliminates this vulnerability. Applying the patch beba460a299150b5d8dcbe3474a8f4bdf0205180/d50a9b7fd07296a1ab81c49ceba14cae3d31df86/4ac15caa27ff842b068a54f1c6a8ff8b31f658e7/1ca52c0983c34fca506921791202ed5bdafd5306 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 (297892) and CERT Bund (WID-SEC-2026-0324). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Debian Linux
  • Google Cloud Platform
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • IBM QRadar SIEM
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 297892
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-71193

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.122/6.12.67/6.18.7/6.19-rc6
Patch: beba460a299150b5d8dcbe3474a8f4bdf0205180/d50a9b7fd07296a1ab81c49ceba14cae3d31df86/4ac15caa27ff842b068a54f1c6a8ff8b31f658e7/1ca52c0983c34fca506921791202ed5bdafd5306

Timelineinfo

01/31/2026 CVE reserved
02/04/2026 +4 days Advisory disclosed
02/04/2026 +0 days VulDB entry created
04/30/2026 +84 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-71193 (🔒)
GCVE (CVE): GCVE-0-2025-71193
GCVE (VulDB): GCVE-100-344320
CERT Bund: WID-SEC-2026-0324 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 02/04/2026 18:15
Updated: 04/30/2026 01:47
Changes: 02/04/2026 18:15 (59), 02/05/2026 15:12 (7), 02/07/2026 17:51 (2), 04/30/2026 01:47 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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