Linux Kernel up to 5.10.187/5.15.120/6.1.38/6.4.3 usb u_serial null pointer dereference

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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.10.187/5.15.120/6.1.38/6.4.3 and classified as critical. This affects the function u_serial of the component usb. Executing a manipulation can lead to null pointer dereference. This vulnerability is handled as CVE-2023-53356. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 5.10.187/5.15.120/6.1.38/6.4.3 and classified as critical. This vulnerability affects the function u_serial of the component usb. 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: usb: gadget: u_serial: Add null pointer check in gserial_suspend Consider a case where gserial_disconnect has already cleared gser->ioport. And if gserial_suspend gets called afterwards, it will lead to accessing of gser->ioport and thus causing null pointer dereference. Avoid this by adding a null pointer check. Added a static spinlock to prevent gser->ioport from becoming null after the newly added null pointer check.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2023-53356 since 09/16/2025. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 265478 (Linux Distros Unpatched Vulnerability : CVE-2023-53356), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.188, 5.15.121, 6.1.39 or 6.4.4 eliminates this vulnerability. Applying the patch 2788a3553f7497075653210b42e2aeb6ba95e28e/a8ea7ed644cbf6314b5b0136b5398754b549fb8f/e60a827ac074ce6bd58305fe5a86afab5fce6a04/374447e3367767156405bedd230c5d391f4b7962/2f6ecb89fe8feb2b60a53325b0eeb9866d88909a 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 (265478) and CERT Bund (WID-SEC-2025-2087). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • IBM QRadar SIEM
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • Dell Secure Connect Gateway

Productinfo

Type

Vendor

Name

Version

License

Website

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

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: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 265478
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53356

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.188/5.15.121/6.1.39/6.4.4
Patch: 2788a3553f7497075653210b42e2aeb6ba95e28e/a8ea7ed644cbf6314b5b0136b5398754b549fb8f/e60a827ac074ce6bd58305fe5a86afab5fce6a04/374447e3367767156405bedd230c5d391f4b7962/2f6ecb89fe8feb2b60a53325b0eeb9866d88909a

Timelineinfo

09/16/2025 CVE reserved
09/17/2025 +1 days Advisory disclosed
09/17/2025 +0 days VulDB entry created
12/27/2025 +101 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53356 (🔒)
GCVE (CVE): GCVE-0-2023-53356
GCVE (VulDB): GCVE-100-324706
CERT Bund: WID-SEC-2025-2087 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 09/17/2025 17:44
Updated: 12/27/2025 04:13
Changes: 09/17/2025 17:44 (59), 09/22/2025 18:08 (2), 12/11/2025 18:20 (10), 12/27/2025 04:13 (7)
Complete: 🔍
Cache ID: 216::103

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