What is CVE-2023-53153?

CVE-2023-53153 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 2.6.32 onward and patched in 4.14.308, 4.19.276, 5.4.235 and others. CVE-2023-53153 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53153?

CVE-2023-53153 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-53153?

Yes, CVE-2023-53153 has been patched. Fixed versions include 4.14.308, 4.19.276, 5.4.235 and others. If you are running Linux kernel 2.6.32 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53153 actively exploited?

CVE-2023-53153 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2023-53153

High

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: Fix use after free for wext Key information in wext.connect is not reset on (re)connect and can hold data from a previous connection. Reset key data to avoid that drivers or mac80211 incorrectly detect a WEP connection request and access the freed or already reused memory. Additionally optimize cfg80211_sme_connect() and avoid an useless schedule of conn_work.

Package Linux Kernel

Published 2025-09-15

Last modified 2025-11-24

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-416

CVE-2023-53153 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 2.6.32 and later are affected. Fixed in 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.99, 6.1.16, 6.2.3, 6.3 and their respective stable series.

Affected from

≥ 2.6.32

Fixed in

✓ 4.14.308 4.14.x ✓ 4.19.276 4.19.x ✓ 5.4.235 5.4.x ✓ 5.10.173 5.10.x ✓ 5.15.99 5.15.x ✓ 6.1.16 6.1.x ✓ 6.2.3 6.2.x ✓ 6.3

References

8 total

Kernel Git
https://git.kernel.org/stable/c/015b8cc5e7c4d7bb671f1984d7b7338c310b185b

Patch
Kernel Git
https://git.kernel.org/stable/c/22dfb21bf1cd876616d45cda1bc6daa89eec6747

Patch
Kernel Git
https://git.kernel.org/stable/c/2cfe78619b0de6d2da773978bc2d22797212eaa7

Patch
Kernel Git
https://git.kernel.org/stable/c/66af4a2ab1d65d556d638cb9555a3b823c2557a9

Patch
Kernel Git
https://git.kernel.org/stable/c/6f1959c17d4cb5b74af6fc31dc787e1dc3e4f6e2

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2023-53153

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-09-15

Modified 2025-11-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53153?

CVE-2023-53153 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 2.6.32 onward and has been patched in 4.14.308, 4.19.276, 5.4.235 and others. CVE-2023-53153 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53153?

CVE-2023-53153 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-53153?

Yes. CVE-2023-53153 has been patched. Fixed versions include 4.14.308, 4.19.276, 5.4.235 and others. If you are running Linux kernel 2.6.32 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53153 actively exploited?

No. CVE-2023-53153 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.