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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://git.kernel.org/stable/c/2788a3553f7497075653210b42e2aeb6ba95e28e cve-icon cve-icon
https://git.kernel.org/stable/c/2f6ecb89fe8feb2b60a53325b0eeb9866d88909a cve-icon cve-icon
https://git.kernel.org/stable/c/374447e3367767156405bedd230c5d391f4b7962 cve-icon cve-icon
https://git.kernel.org/stable/c/a8ea7ed644cbf6314b5b0136b5398754b549fb8f cve-icon cve-icon
https://git.kernel.org/stable/c/e60a827ac074ce6bd58305fe5a86afab5fce6a04 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025091721-CVE-2023-53356-5383@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53356 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53356 cve-icon
History

Thu, 11 Dec 2025 13:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Thu, 18 Sep 2025 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Thu, 18 Sep 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate

Wed, 17 Sep 2025 15:00:00 +0000

Type Values Removed Values Added
Description 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.
Title usb: gadget: u_serial: Add null pointer check in gserial_suspend
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-09-17T14:56:46.113Z

Updated: 2025-09-17T14:56:46.113Z

Reserved: 2025-09-16T16:08:59.567Z

Link: CVE-2023-53356

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2025-09-17T15:15:39.640

Modified: 2025-12-11T12:49:46.850

Link: CVE-2023-53356

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-09-17T00:00:00Z

Links: CVE-2023-53356 - Bugzilla