What is CVE-2023-53633?

CVE-2023-53633 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 6.4 onward and patched in 6.4.7 and 6.5. CVE-2023-53633 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53633?

CVE-2023-53633 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-2023-53633?

Yes, CVE-2023-53633 has been patched. Fixed versions include 6.4.7 and 6.5. 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-2023-53633 actively exploited?

CVE-2023-53633 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-2023-53633

Medium

In the Linux kernel, the following vulnerability has been resolved: accel/qaic: Fix a leak in map_user_pages() If get_user_pages_fast() allocates some pages but not as many as we wanted, then the current code leaks those pages. Call put_page() on the pages before returning.

Package Linux Kernel

Published 2025-10-07

Last modified 2026-02-03

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-2023-53633 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 6.4 and later are affected. Fixed in 6.4.7, 6.5 and their respective stable series.

Affected from

≥ 6.4

Fixed in

✓ 6.4.7 6.4.x ✓ 6.5

References

2 total

Kernel Git
https://git.kernel.org/stable/c/73274c33d961f4aa0f968f763e2c9f4210b4f4a3

Patch
Kernel Git
https://git.kernel.org/stable/c/cdcba752a3d48fbe6f05cf2c91ab9497c8daad0c

Patch

Details

CVE ID CVE-2023-53633

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-10-07

Modified 2026-02-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53633?

CVE-2023-53633 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 6.4 onward and has been patched in 6.4.7 and 6.5. CVE-2023-53633 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53633?

CVE-2023-53633 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-2023-53633?

Yes. CVE-2023-53633 has been patched. Fixed versions include 6.4.7 and 6.5. 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-2023-53633 actively exploited?

No. CVE-2023-53633 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.