What is CVE-2023-53662?

CVE-2023-53662 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 5.13 onward and patched in 5.15.199, 6.1.54, 6.5.4 and others. CVE-2023-53662 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53662?

CVE-2023-53662 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-53662?

Yes, CVE-2023-53662 has been patched. Fixed versions include 5.15.199, 6.1.54, 6.5.4 and others. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53662 actively exploited?

CVE-2023-53662 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2023-53662

Medium

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.

Package Linux Kernel

Published 2025-10-07

Last modified 2026-02-06

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-401

CVE-2023-53662 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.13 and later are affected. Fixed in 5.15.199, 6.1.54, 6.5.4, 6.6 and their respective stable series.

Affected from

≥ 5.13

Fixed in

✓ 5.15.199 5.15.x ✓ 6.1.54 6.1.x ✓ 6.5.4 6.5.x ✓ 6.6

References

4 total

Kernel Git
https://git.kernel.org/stable/c/1fb3f1bbfdb511034b0360dbeb0f6a8424ed2a5c

Patch
Kernel Git
https://git.kernel.org/stable/c/36daf050be3f6f067631dc52054de2d3b7cc849f

Patch
Kernel Git
https://git.kernel.org/stable/c/7ca4b085f430f3774c3838b3da569ceccd6a0177

Patch
Kernel Git
https://git.kernel.org/stable/c/98fc9c2cc45cfcb56961a73de3ec69b474063fc0

Details

CVE ID CVE-2023-53662

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-10-07

Modified 2026-02-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53662?

CVE-2023-53662 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 5.13 onward and has been patched in 5.15.199, 6.1.54, 6.5.4 and others. CVE-2023-53662 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53662?

CVE-2023-53662 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-53662?

Yes. CVE-2023-53662 has been patched. Fixed versions include 5.15.199, 6.1.54, 6.5.4 and others. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53662 actively exploited?

No. CVE-2023-53662 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.