CVE-2023-53662
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-07

Last updated on: 2026-02-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix memory leaks in ext4_fname_{setup_filename,prepare_lookup} If the filename casefolding fails, we'll be leaking memory from the fscrypt_name struct, namely from the 'crypto_buf.name' member. Make sure we free it in the error path on both ext4_fname_setup_filename() and ext4_fname_prepare_lookup() functions.
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Meta Information
Published
2025-10-07
Last Modified
2026-02-06
Generated
2026-06-16
AI Q&A
2025-10-07
EPSS Evaluated
2026-06-14
NVD
CVE-2023-53662
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-401 The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
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Executive Summary

This vulnerability is a memory leak in the Linux kernel's ext4 filesystem code. Specifically, if filename casefolding fails during certain functions (ext4_fname_setup_filename and ext4_fname_prepare_lookup), memory allocated for the fscrypt_name struct's crypto_buf.name member is not freed properly, leading to a memory leak.

Impact Analysis

The memory leak caused by this vulnerability can lead to increased memory usage and potentially degrade system performance or stability over time if the error condition occurs frequently.

Mitigation Strategies

Apply the patch or update to a Linux kernel version that includes the fix for the memory leak in ext4_fname_setup_filename and ext4_fname_prepare_lookup functions to prevent memory leaks when filename casefolding fails.

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