CVE-2023-4458

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.

CVSS v3 4.0 MEDIUM

4.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2023-4458	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2325516	Issue Tracking Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-24-590/	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

History

05 Aug 2025, 18:42

Type	Values Removed	Values Added
References	~~() https://access.redhat.com/security/cve/CVE-2023-4458 -~~	() https://access.redhat.com/security/cve/CVE-2023-4458 - Vendor Advisory
References	~~() https://bugzilla.redhat.com/show_bug.cgi?id=2325516 -~~	() https://bugzilla.redhat.com/show_bug.cgi?id=2325516 - Issue Tracking, Vendor Advisory
References	~~() https://www.zerodayinitiative.com/advisories/ZDI-24-590/ -~~	() https://www.zerodayinitiative.com/advisories/ZDI-24-590/ - Third Party Advisory
CPE		cpe:2.3:o:linux:linux_kernel::::::::
First Time		Linux Linux linux Kernel

Information

Published : 2024-11-14 12:15

Updated : 2025-08-19 17:32

NVD link : CVE-2023-4458

Mitre link : CVE-2023-4458

CVE.ORG link : CVE-2023-4458

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-125

Out-of-bounds Read

{"id": "CVE-2023-4458", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "patrick@puiterwijk.org", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 4.0, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 2.2}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2024-11-14T12:15:17.487", "references": [{"url": "https://access.redhat.com/security/cve/CVE-2023-4458", "tags": ["Vendor Advisory"], "source": "patrick@puiterwijk.org"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2325516", "tags": ["Issue Tracking", "Vendor Advisory"], "source": "patrick@puiterwijk.org"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-24-590/", "tags": ["Third Party Advisory"], "source": "patrick@puiterwijk.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "patrick@puiterwijk.org", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en el an\u00e1lisis de atributos extendidos en el m\u00f3dulo ksmbd del kernel. El problema es el resultado de la falta de una validaci\u00f3n adecuada de los datos proporcionados por el usuario, lo que puede provocar una lectura m\u00e1s all\u00e1 del final de un b\u00fafer asignado. Un atacante puede aprovechar esto para divulgar informaci\u00f3n confidencial sobre las instalaciones afectadas de Linux. Solo los sistemas con ksmbd habilitado son vulnerables a esta CVE."}], "lastModified": "2025-08-19T17:32:26.033", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9D42A7C6-CE38-4D73-B7AC-615F6D53F783", "versionEndExcluding": "6.6"}], "operator": "OR"}]}], "sourceIdentifier": "patrick@puiterwijk.org"}