What is CVE-2023-53620?

CVE-2023-53620 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Improper Locking flaw (CWE-667), affecting Linux kernel versions from 2.6.12 onward and patched in 6.1.30, 6.3.4 and 6.4. CVE-2023-53620 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53620?

CVE-2023-53620 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-2023-53620?

Yes, CVE-2023-53620 has been patched. Fixed versions include 6.1.30, 6.3.4 and 6.4. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53620 actively exploited?

CVE-2023-53620 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Improper Locking (CWE-667)?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/667.html

CVE-2023-53620

Medium

In the Linux kernel, the following vulnerability has been resolved: md: fix soft lockup in status_resync status_resync() will calculate 'curr_resync - recovery_active' to show user a progress bar like following: [============>........] resync = 61.4% 'curr_resync' and 'recovery_active' is updated in md_do_sync(), and status_resync() can read them concurrently, hence it's possible that 'curr_resync - recovery_active' can overflow to a huge number. In this case status_resync() will be stuck in the loop to print a large amount of '=', which will end up soft lockup. Fix the problem by setting 'resync' to MD_RESYNC_ACTIVE in this case, this way resync in progress will be reported to user.

Package Linux Kernel

Published 2025-10-07

Last modified 2026-02-05

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-667

CVE-2023-53620 is a Improper Locking vulnerability

What is Improper Locking?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. Learn more on MITRE CWE

Affected versions

Linux kernel versions 2.6.12 and later are affected. Fixed in 6.1.30, 6.3.4, 6.4 and their respective stable series.

Affected from

≥ 2.6.12

Fixed in

✓ 6.1.30 6.1.x ✓ 6.3.4 6.3.x ✓ 6.4

References

3 total

Kernel Git
https://git.kernel.org/stable/c/23309704e90859af2662bedc44101e6d1d2ece7e

Patch
Kernel Git
https://git.kernel.org/stable/c/6efddf1e32e2a264694766ca485a4f5e04ee82a7

Patch
Kernel Git
https://git.kernel.org/stable/c/b4acb6c3ede88d6b7d33742a09e63cfce5e7fb69

Patch

Details

CVE ID CVE-2023-53620

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-10-07

Modified 2026-02-05

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53620?

CVE-2023-53620 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Improper Locking flaw (CWE-667) . It affects Linux kernel versions from 2.6.12 onward and has been patched in 6.1.30, 6.3.4 and 6.4. CVE-2023-53620 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53620?

CVE-2023-53620 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-2023-53620?

Yes. CVE-2023-53620 has been patched. Fixed versions include 6.1.30, 6.3.4 and 6.4. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53620 actively exploited?

No. CVE-2023-53620 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.