What is CVE-2023-53330?

CVE-2023-53330 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 2.6.35 onward and patched in 4.14.303, 4.19.270, 5.4.229 and others. CVE-2023-53330 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53330?

CVE-2023-53330 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-2023-53330?

Yes, CVE-2023-53330 has been patched. Fixed versions include 4.14.303, 4.19.270, 5.4.229 and others. If you are running Linux kernel 2.6.35 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53330 actively exploited?

CVE-2023-53330 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-2023-53330

Medium

In the Linux kernel, the following vulnerability has been resolved: caif: fix memory leak in cfctrl_linkup_request() When linktype is unknown or kzalloc failed in cfctrl_linkup_request(), pkt is not released. Add release process to error path.

Package Linux Kernel

Published 2025-09-16

Last modified 2026-01-14

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-2023-53330 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 2.6.35 and later are affected. Fixed in 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.87, 6.0.19, 6.1.5, 6.2 and their respective stable series.

Affected from

≥ 2.6.35

Fixed in

✓ 4.14.303 4.14.x ✓ 4.19.270 4.19.x ✓ 5.4.229 5.4.x ✓ 5.10.163 5.10.x ✓ 5.15.87 5.15.x ✓ 6.0.19 6.0.x ✓ 6.1.5 6.1.x ✓ 6.2

References

The following references provide additional information about CVE-2023-53330 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/1dddeceb26002cfea4c375e92ac6498768dc7349
Patch
Kernel patch commit
https://git.kernel.org/stable/c/33df9c5d5e2a18c70f5f5f3c2757d654c1b6ffa3
Patch
Kernel patch commit
https://git.kernel.org/stable/c/3acf3783a84cbdf0c9f8cf2f32ee9c49af93a2da
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2023-53330

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-09-16

Modified 2026-01-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53330?

CVE-2023-53330 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 2.6.35 onward and has been patched in 4.14.303, 4.19.270, 5.4.229 and others. CVE-2023-53330 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53330?

CVE-2023-53330 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-2023-53330?

Yes — CVE-2023-53330 has been patched. Fixed versions include 4.14.303, 4.19.270, 5.4.229 and others. If you are running Linux kernel 2.6.35 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53330 actively exploited?

No — CVE-2023-53330 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. View CWE-401 on MITRE CWE →