CVE-2023-39189

A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.

CVSS v3 5.1 MEDIUM

5.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 4.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2024:2394
https://access.redhat.com/errata/RHSA-2024:2950
https://access.redhat.com/errata/RHSA-2024:3138
https://access.redhat.com/security/cve/CVE-2023-39189	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2226777	Issue Tracking Patch Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2394
https://access.redhat.com/errata/RHSA-2024:2950
https://access.redhat.com/errata/RHSA-2024:3138
https://access.redhat.com/security/cve/CVE-2023-39189	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2226777	Issue Tracking Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/html/ssa-794697.html

Configurations

Configuration 1 (hide)

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

Configuration 2 (hide)

OR	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*

Configuration 3 (hide)

cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*

History

15 Oct 2026, 00:16

Type	Values Removed	Values Added
References		() https://cert-portal.siemens.com/productcert/html/ssa-398330.html - () https://cert-portal.siemens.com/productcert/html/ssa-794697.html -

Information

Published : 2023-10-09 18:15

Updated : 2026-10-15 00:16

NVD link : CVE-2023-39189

Mitre link : CVE-2023-39189

CVE.ORG link : CVE-2023-39189

JSON object : View

Products Affected

linux

linux_kernel

redhat

enterprise_linux

fedoraproject

fedora

CWE

CWE-125

Out-of-bounds Read

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The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en el subsistema Netfilter en el kernel de Linux. La funci\u00f3n nfnl_osf_add_callback no valid\u00f3 el campo opt_num controlado por el modo de usuario. Esta falla permite que un atacante local privilegiado (CAP_NET_ADMIN) active una lectura fuera de l\u00edmites, lo que provoca un bloqueo o la divulgaci\u00f3n de informaci\u00f3n."}], "lastModified": "2026-10-15T00:16:35.363", "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"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CC559B26-5DFC-4B7A-A27C-B77DE755DFF9"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}