PT-2025-40693 · Linux+1 · Linux Kernel+1

Published 2025-10-04 · Updated 2025-12-04 · CVE-2023-53551

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel's USB gadget u serial driver. Specifically, a null pointer dereference can occur in the gserial resume() function if gserial disconnect() has already cleared gser->ioport and a wakeup interrupt triggers the function. A static spinlock was added to prevent gser->ioport from becoming null after the check.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2023-53551

SUSE-SU-2025:4111-1

SUSE-SU-2025:4139-1

SUSE-SU-2025:4149-1

SUSE-SU-2025:4320-1

Affected Products

Linux Kernel

Suse

References · 448

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53551.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2023-53551 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:4139-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53551 · Vendor Advisory
• https://git.kernel.org/stable/c/5ec63fdbca604568890c577753c6f66c5b3ef0b5 · Patch
• https://security-tracker.debian.org/tracker/CVE-2023-53551 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4149-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4111-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53551 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53551 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53551 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4320-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53551 · Vendor Advisory
• https://git.kernel.org/stable/c/44e004f757a7ae13dfebaadbcfdb1a6f98c10377 · Patch
• https://cve.org/CVERecord?id=CVE-2023-53551 · Security Note