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CVE-2026-5367— Ovn: ovn: information disclosure via crafted dhcpv6 packets

Quick assessment

Affected
Red Hat Fast Datapath for Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OVN是OVN开源的一个基于虚拟网络技术的数据中心网络虚拟化平台。 OVN存在安全漏洞，该漏洞源于处理特制DHCPv6 SOLICIT数据包时客户端ID长度膨胀，可能导致远程攻击者造成ovn-controller越界读取，泄露堆内存中的敏感信息。

CVSS 8.6 · High EPSS 0.88% · P58

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 24

VendorProduct Version RangeStatus
Red Hat Fast Datapath for Red Hat Enterprise Linux 10 0:25.03.2-100.el10fdp< * unaffected
0:25.09.2-103.el10fdp< * unaffected
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 0:21.12.0-145.el8fdp< * unaffected
0:23.06.4-30.el8fdp< * unaffected
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:23.06.4-30.el9fdp< * unaffected
0:23.09.6-16.el9fdp< * unaffected
0:24.03.7-82.el9fdp< * unaffected
0:25.03.2-100.el9fdp< * unaffected
0:25.09.2-103.el9fdp< * unaffected
Red Hat Fast Datapath for RHEL 8 any unaffected
any unaffected
any unaffected
any affected
Red Hat Fast Datapath for RHEL 9 any affected
any affected
Red Hat Red Hat OpenShift Container Platform 4 any unaffected
any unaffected
any unaffected
any unaffected
any affected
any unaffected
any affected
any affected
… +1 more rows
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I. Basic Information for CVE-2026-5367

Vulnerability Information
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Vulnerability Title
Ovn: ovn: information disclosure via crafted dhcpv6 packets
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in OVN (Open Virtual Network). A remote attacker, by sending crafted DHCPv6 (Dynamic Host Configuration Protocol for IPv6) SOLICIT packets with an inflated Client ID length, could cause the ovn-controller to read beyond the bounds of a packet. This out-of-bounds read can lead to the disclosure of sensitive information stored in heap memory, which is then returned to the attacker's virtual machine port.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
长度参数不一致性处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
OVN 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OVN是OVN开源的一个基于虚拟网络技术的数据中心网络虚拟化平台。 OVN存在安全漏洞，该漏洞源于处理特制DHCPv6 SOLICIT数据包时客户端ID长度膨胀，可能导致远程攻击者造成ovn-controller越界读取，泄露堆内存中的敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Fast Datapath for Red Hat Enterprise Linux 10 0:25.03.2-100.el10fdp ~ * cpe:/o:redhat:enterprise_linux:10::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 10 0:25.09.2-103.el10fdp ~ * cpe:/o:redhat:enterprise_linux:10::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 0:21.12.0-145.el8fdp ~ * cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 0:23.06.4-30.el8fdp ~ * cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:23.06.4-30.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:23.09.6-16.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:24.03.7-82.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:25.03.2-100.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:25.09.2-103.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for RHEL 8 - cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for RHEL 8 - cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for RHEL 8 - cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for RHEL 8 - cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for RHEL 9 - cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for RHEL 9 - cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-5367

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III. Intelligence Information for CVE-2026-5367

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Vendor Advisories for CVE-2026-5367 (6)

Other References for CVE-2026-5367 (1)

IV. Related Vulnerabilities

Same product: Fast Datapath for Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-130

V. Comments for CVE-2026-5367

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