PT-2025-38391 · Linux+5 · Linux Kernel+5

Published 2023-11-07 · Updated 2026-03-14 · CVE-2023-53409

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 memory leak exists in the Linux kernel when using the debugfs lookup() function. Failing to call dput() on the result of debugfs lookup() can lead to a memory leak over time. The issue is addressed by recommending the use of debugfs lookup and remove(), which handles the necessary logic to prevent the leak.

Recommendations Use the debugfs lookup and remove() function instead of debugfs lookup() to avoid memory leaks.

Exploit

Fix

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

ALSA-2025_16880

BDU:2026-05898

CESA-2023_7077

CVE-2023-53409

RHSA-2023:6583

RHSA-2023:7077

RHSA-2023_6583

RHSA-2023_7077

SUSE-SU-2025:03615-1

SUSE-SU-2025:03628-1

SUSE-SU-2025:3716-1

SUSE-SU-2025:3761-1

Affected Products

Astra Linux

Centos

Debian

Linux Kernel

Red Hat

Suse

References · 867

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53409.json · Exploit
• https://git.kernel.org/stable/c/09709a49283f79184c998d6dafcc01590e4d654d · Patch
• https://osv.dev/vulnerability/BELL-CVE-2023-53409 · Vendor Advisory
• https://git.kernel.org/stable/c/bf0fd01c7cc1061fb2cfda3e2044371642108e6c · Patch
• https://git.kernel.org/stable/c/79ac2b01e033181e21cc84216ace1f4160eb8950 · Patch
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2023-53409 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53409 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:03615-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53409 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-05898 · Security Note
• https://osv.dev/vulnerability/CVE-2023-53409 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53409 · Security Note
• https://ubuntu.com/security/CVE-2023-53409 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:03628-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53409 · Security Note