What is CVE-2023-53456?

CVE-2023-53456 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 3.2 onward and patched in 4.14.326, 4.19.295, 5.4.257 and others. CVE-2023-53456 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53456?

CVE-2023-53456 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-2023-53456?

Yes, CVE-2023-53456 has been patched. Fixed versions include 4.14.326, 4.19.295, 5.4.257 and others. If you are running Linux kernel 3.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53456 actively exploited?

CVE-2023-53456 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53456

Medium

In the Linux kernel, the following vulnerability has been resolved: scsi: qla4xxx: Add length check when parsing nlattrs There are three places that qla4xxx parses nlattrs: - qla4xxx_set_chap_entry() - qla4xxx_iface_set_param() - qla4xxx_sysfs_ddb_set_param() and each of them directly converts the nlattr to specific pointer of structure without length checking. This could be dangerous as those attributes are not validated and a malformed nlattr (e.g., length 0) could result in an OOB read that leaks heap dirty data. Add the nla_len check before accessing the nlattr data and return EINVAL if the length check fails.

Package Linux Kernel

Published 2025-10-01

Last modified 2026-01-16

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

Affected versions

Linux kernel versions 3.2 and later are affected. Fixed in 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.132, 6.1.53, 6.4.16, 6.5.3, 6.6 and their respective stable series.

Affected from

≥ 3.2

Fixed in

✓ 4.14.326 4.14.x ✓ 4.19.295 4.19.x ✓ 5.4.257 5.4.x ✓ 5.10.195 5.10.x ✓ 5.15.132 5.15.x ✓ 6.1.53 6.1.x ✓ 6.4.16 6.4.x ✓ 6.5.3 6.5.x ✓ 6.6

References

The following references provide additional information about CVE-2023-53456 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/25feffb3fbd51ae81d92c65cebc0e932663828b3
Patch
Kernel patch commit
https://git.kernel.org/stable/c/47cd3770e31df942e2bb925a9a855c79ed0662eb
Patch
Kernel patch commit
https://git.kernel.org/stable/c/47f3be62eab50b8cd7e1ae5fc2c4dae687497c34
Patch

9 patch commits total View all on NVD

Details

CVE ID CVE-2023-53456

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-10-01

Modified 2026-01-16

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53456?

CVE-2023-53456 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 3.2 onward and has been patched in 4.14.326, 4.19.295, 5.4.257 and others. CVE-2023-53456 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53456?

CVE-2023-53456 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-2023-53456?

Yes — CVE-2023-53456 has been patched. Fixed versions include 4.14.326, 4.19.295, 5.4.257 and others. If you are running Linux kernel 3.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53456 actively exploited?

No — CVE-2023-53456 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.