Linux Kernel up to 6.19.11 Gadget Endpoint __cdns3_gadget_ep_queue null pointer dereference

CVSS Meta Temp Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.19.11. It has been rated as critical. The impacted element is the function __cdns3_gadget_ep_queue of the component Gadget Endpoint. Performing a manipulation results in null pointer dereference. This vulnerability is known as CVE-2026-31755. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.19.11. This affects the function __cdns3_gadget_ep_queue of the component Gadget Endpoint. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: fix NULL pointer dereference in ep_queue When the gadget endpoint is disabled or not yet configured, the ep->desc pointer can be NULL. This leads to a NULL pointer dereference when __cdns3_gadget_ep_queue() is called, causing a kernel crash. Add a check to return -ESHUTDOWN if ep->desc is NULL, which is the standard return code for unconfigured endpoints. This prevents potential crashes when ep_queue is called on endpoints that are not ready.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-31755 since 03/09/2026. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 326222 (EulerOS 2.0 SP12 : kernel (EulerOS-SA-2026-2535)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22 or 6.19.12 eliminates this vulnerability. Applying the patch 3d1433fe34b224b90259e207e5389e95b504ef04/fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6/9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9/d61446dfc9d387775bb1b95b081953201b9222af/390536cc6af4ca5566bc3bf1f8b704700380cd2c/14bf08ab2cdfcdfd3f13e799d06692a1b3e0745f/7f6f127b9bc34bed35f56faf7ecb1561d6b39000 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 vulnerability database at Tenable (326222). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

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

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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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: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 326222
Nessus Name: EulerOS 2.0 SP12 : kernel (EulerOS-SA-2026-2535)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.15.203/6.1.168/6.6.134/6.12.81/6.18.22/6.19.12
Patch: 3d1433fe34b224b90259e207e5389e95b504ef04/fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6/9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9/d61446dfc9d387775bb1b95b081953201b9222af/390536cc6af4ca5566bc3bf1f8b704700380cd2c/14bf08ab2cdfcdfd3f13e799d06692a1b3e0745f/7f6f127b9bc34bed35f56faf7ecb1561d6b39000

Timelineinfo

03/09/2026 CVE reserved
05/01/2026 +52 days Advisory disclosed
05/01/2026 +0 days VulDB entry created
07/10/2026 +70 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31755 (🔒)
GCVE (CVE): GCVE-0-2026-31755
GCVE (VulDB): GCVE-100-360675

Entryinfo

Created: 05/01/2026 17:54
Updated: 07/10/2026 11:54
Changes: 05/01/2026 17:54 (59), 07/04/2026 14:58 (10), 07/10/2026 11:54 (2)
Complete: 🔍
Cache ID: 216::103

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