PT-2025-38385 · Linux+2 · Linux Kernel+2

Published 2025-09-18 · Updated 2026-03-14 · CVE-2023-53403

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 related to the use of the debugfs lookup() function within the time/debug subsystem. Failing to call dput() on the result of debugfs lookup() leads to a memory leak over time. The issue is resolved by using 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

CVE-2023-53403

Affected Products

Astra Linux

Debian

Linux Kernel

References · 19

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53403.json · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53403 · Vendor Advisory
• https://git.kernel.org/stable/c/dc39fbd865a9819db4b622f610ba17b2ebc294f4 · Patch
• https://osv.dev/vulnerability/CVE-2023-53403 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53403 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53403 · Vendor Advisory
• https://git.kernel.org/stable/c/b588b42d077ce93c98704b41003bcec6a564b738 · Patch
• https://cve.org/CVERecord?id=CVE-2023-53403 · Security Note
• https://ubuntu.com/security/CVE-2023-53403 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53403 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2023-53403 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2023-53403 · Vendor Advisory
• https://git.kernel.org/stable/c/15cffd01ed80e3506e29ba9f441e2358413b7317 · Patch
• https://git.kernel.org/stable/c/5b268d8abaec6cbd4bd70d062e769098d96670aa · Patch
• https://twitter.com/VulmonFeeds/status/1968726095382896915 · Twitter Post