What is CVE-2023-4458?

CVE-2023-4458 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, classified as a Out-of-bounds Read flaw (CWE-125). CVE-2023-4458 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-4458?

CVE-2023-4458 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Is there a patch available for CVE-2023-4458?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-4458 patch availability.

Is CVE-2023-4458 actively exploited?

CVE-2023-4458 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Read (CWE-125)?

The product reads data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/125.html

CVE-2023-4458

High

A flaw was found within the parsing of extended attributes in the kernel ksmbd module. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this to disclose sensitive information on affected installations of Linux. Only systems with ksmbd enabled are vulnerable to this CVE.

Package Linux Kernel

Published 2024-11-14

Last modified 2026-10-02

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Vector string

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

Weakness type

CWE-125

CVE-2023-4458 is a Out-of-bounds Read vulnerability

What is Out-of-bounds Read?

The product reads data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

References

3 total

Red Hat
https://access.redhat.com/security/cve/CVE-2023-4458

Vendor Advisory
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2325516

Issue Tracking Vendor Advisory
Zerodayinitiative
https://www.zerodayinitiative.com/advisories/ZDI-24-590/

Third Party Advisory

Details

CVE ID CVE-2023-4458

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2024-11-14

Modified 2026-10-02

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-4458?

CVE-2023-4458 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 , classified as an Out-of-bounds Read flaw (CWE-125) . CVE-2023-4458 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-4458?

CVE-2023-4458 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Is there a patch available for CVE-2023-4458?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-4458 patch availability.
Is CVE-2023-4458 actively exploited?

No. CVE-2023-4458 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.