What is CVE-2023-53528?

CVE-2023-53528 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.4 onward and patched in 6.4.16, 6.5.3 and 6.6. CVE-2023-53528 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53528?

CVE-2023-53528 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-2023-53528?

Yes, CVE-2023-53528 has been patched. Fixed versions include 6.4.16, 6.5.3 and 6.6. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53528 actively exploited?

CVE-2023-53528 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53528

Medium

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix unsafe drain work queue code If create_qp does not fully succeed it is possible for qp cleanup code to attempt to drain the send or recv work queues before the queues have been created causing a seg fault. This patch checks to see if the queues exist before attempting to drain them.

Package Linux Kernel

Published 2025-10-01

Last modified 2026-04-06

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

Affected versions

Linux kernel versions 6.4 and later are affected. Fixed in 6.4.16, 6.5.3, 6.6 and their respective stable series.

Affected from

≥ 6.4

Fixed in

✓ 6.4.16 6.4.x ✓ 6.5.3 6.5.x ✓ 6.6

References

The following references provide additional information about CVE-2023-53528 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/5993b75d0bc71cd2b441d174b028fc36180f032c
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d366642b3099bd322375f5b71ba84ab1d586cd6d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/da572f6313aeead1f79e0810666bd8d8ffc794d4
Patch

Details

CVE ID CVE-2023-53528

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-10-01

Modified 2026-04-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53528?

CVE-2023-53528 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.4 onward and has been patched in 6.4.16, 6.5.3 and 6.6. CVE-2023-53528 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53528?

CVE-2023-53528 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-2023-53528?

Yes — CVE-2023-53528 has been patched. Fixed versions include 6.4.16, 6.5.3 and 6.6. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53528 actively exploited?

No — CVE-2023-53528 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.