PT-2025-37537 · Linux+3 · Linux Kernel+3

Published 2023-01-01 · Updated 2026-03-14 · CVE-2023-53173

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 tty subsystem, specifically within the pcn uart driver, related to the use of the debugfs lookup() function. Failing to call dput() on the result of debugfs lookup() leads to a memory leak over time. The issue is addressed by utilizing debugfs lookup and remove(), which handles the necessary memory management logic.

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

Exploit

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

ALSA-2025_12746

ALSA-2025_12752

ALSA-2025_12753

ALSA-2025_16880

BDU:2026-04623

CVE-2023-53173

RHSA-2024:9315

RHSA-2024_9315

Affected Products

Astra Linux

Debian

Linux Kernel

Red Hat

References · 25

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53173.json · Exploit
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2023-53173 · Vendor Advisory
• https://git.kernel.org/stable/c/4459d1e7bd0421b3b6fcd745773d8823f71615ef · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-53173 · Security Note
• https://bdu.fstec.ru/vul/2026-04623 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53173 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53173 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53173 · Vendor Advisory
• https://git.kernel.org/stable/c/139769c4bd8273b5e3f85ea474aa37018fe7e436 · Patch
• https://ubuntu.com/security/CVE-2023-53173 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53173 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53173 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53173 · Vendor Advisory
• https://git.kernel.org/stable/c/cf042964c2fa72950bbbf25b2cdd732b873e89db · Patch
• https://git.kernel.org/stable/c/04a189c720aa2b6091442113ce9b9bc93552dff8 · Patch