What is CVE-2023-53381?

CVE-2023-53381 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.14 onward and patched in 5.15.154, 6.1.16, 6.2.3 and others. CVE-2023-53381 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53381?

CVE-2023-53381 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-2023-53381?

Yes, CVE-2023-53381 has been patched. Fixed versions include 5.15.154, 6.1.16, 6.2.3 and others. If you are running Linux kernel 5.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53381 actively exploited?

CVE-2023-53381 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53381

Medium

In the Linux kernel, the following vulnerability has been resolved: NFSD: fix leaked reference count of nfsd4_ssc_umount_item The reference count of nfsd4_ssc_umount_item is not decremented on error conditions. This prevents the laundromat from unmounting the vfsmount of the source file. This patch decrements the reference count of nfsd4_ssc_umount_item on error.

Package Linux Kernel

Published 2025-09-18

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

Affected versions

Linux kernel versions 5.14 and later are affected. Fixed in 5.15.154, 6.1.16, 6.2.3, 6.3 and their respective stable series.

Affected from

≥ 5.14

Fixed in

✓ 5.15.154 5.15.x ✓ 6.1.16 6.1.x ✓ 6.2.3 6.2.x ✓ 6.3

References

The following references provide additional information about CVE-2023-53381 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/2da50149981d05955e51c28e982e9ac29bd73417
Patch
Kernel patch commit
https://git.kernel.org/stable/c/34e8f9ec4c9ac235f917747b23a200a5e0ec857b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6c3c05402547aaca3edb23327b50f01a881831b9
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2023-53381

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-09-18

Modified 2026-01-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53381?

CVE-2023-53381 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.14 onward and has been patched in 5.15.154, 6.1.16, 6.2.3 and others. CVE-2023-53381 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53381?

CVE-2023-53381 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-2023-53381?

Yes — CVE-2023-53381 has been patched. Fixed versions include 5.15.154, 6.1.16, 6.2.3 and others. If you are running Linux kernel 5.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53381 actively exploited?

No — CVE-2023-53381 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.