What is CVE-2023-4387?

CVE-2023-4387 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2023-4387 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-4387?

CVE-2023-4387 has a CVSS score of 7.1 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:N/A:H.

Is there a patch available for CVE-2023-4387?

No patch is currently available for CVE-2023-4387. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-4387 actively exploited?

CVE-2023-4387 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-2023-4387

High

A use-after-free flaw was found in vmxnet3_rq_alloc_rx_buf in drivers/net/vmxnet3/vmxnet3_drv.c in VMware's vmxnet3 ethernet NIC driver in the Linux Kernel. This issue could allow a local attacker to crash the system due to a double-free while cleaning up vmxnet3_rq_cleanup_all, which could also lead to a kernel information leak problem.

Package Linux Kernel

Published 2023-08-16

Last modified 2025-06-03

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2023-4387 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

References

The following references provide additional information about CVE-2023-4387 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://access.redhat.com/errata/RHSA-2022:7683
Red Hat
https://access.redhat.com/errata/RHSA-2022:8267
Red Hat
https://access.redhat.com/security/cve/CVE-2023-4387

Third Party Advisory
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2219270

Issue Tracking Third Party Advisory
Kernel patch commit
https://github.com/torvalds/linux/commit/9e7fef9521e73ca8afd7da9e58c14654b02dfad8
Patch

Details

CVE ID CVE-2023-4387

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2023-08-16

Modified 2025-06-03

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-4387?

CVE-2023-4387 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2023-4387 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-4387?

CVE-2023-4387 has a CVSS score of 7.1 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:N/A:H.
Is there a patch available for CVE-2023-4387?

No patch is currently available for CVE-2023-4387. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-4387 actively exploited?

No — CVE-2023-4387 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (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. View CWE-416 on MITRE CWE →