CVE-2023-53402

kernel/printk/index.c: fix memory leak with using debugfs_lookup()

State: Published
Severity: 5.5 Medium
Published: Sep 18, 2025
Updated: May 11, 2026
Reserved: Sep 17, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

kernel/printk/index.c: fix memory leak with using debugfs_lookup()

When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

Product	Versions
LinuxLinux	337015573718b161891a3473d25f59273f2e626b to before 2e07fa2e30d48d24a791483774a3d4b76769e0cfAffected 337015573718b161891a3473d25f59273f2e626b to before c578a68ffcdc2e8c72556bebdaae2b7500398e81Affected 337015573718b161891a3473d25f59273f2e626b to before 13969236b6900b5a3625ad2193569588e978f1ccAffected 337015573718b161891a3473d25f59273f2e626b to before 55bf243c514553e907efcf2bda92ba090eca8c64Affected
LinuxLinux	5.15Affected before 5.15Not affected 5.15.100 through 5.15.Not affected 6.1.18 through 6.1.Not affected 6.2.5 through 6.2.*Not affected 6.3 and laterNot affected

References

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