Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-18727— Open-iscsi: open-iscsi: integer underflow in iscsiuio dhcpv6 parsing

CVSS 6.5 · Medium EPSS 0.20% · P10

Possible ATT&CK Techniques 1AI

T1498.002 · Reflection Amplification

Affected Version Matrix 2

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 10anyaffected
Red HatRed Hat Enterprise Linux 9anyaffected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-18727

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Open-iscsi: open-iscsi: integer underflow in iscsiuio dhcpv6 parsing
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in open-iscsi's iscsiuio component. This vulnerability involves an integer underflow and out-of-bounds read during Dynamic Host Configuration Protocol for IPv6 (DHCPv6) packet parsing. Specifically, crafted DHCPv6 Advertise traffic with a short User Datagram Protocol (UDP) length can cause the DHCPv6 payload length to underflow. An unauthenticated attacker on an adjacent network segment can exploit this by sending specially crafted IPv6 UDP traffic while the client is in an active DHCPv6 exchange, leading to a denial of service due to a process crash or service disruption.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Vulnerability Title
Open-iSCSI 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open-iSCSI Open-iSCSI是Open-iSCSI组织开源的一个网络存储连接工具。 Open-iSCSI存在数字错误漏洞，该漏洞源于在解析DHCPv6数据包时存在整数下溢和越界读取，可能导致未经身份验证的攻击者通过相邻网络段发送特制IPv6 UDP流量，造成拒绝服务。
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

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Enterprise Linux 10-cpe:/o:redhat:enterprise_linux:10
Red HatRed Hat Enterprise Linux 9-cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-18727

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-18727

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-18727 (2)

Same Patch Batch · Red Hat · 2026-08-12 · 19 CVEs total

CVE-2026-725269.9 CRITICALMulticloud-integrations: multicloud-integrations: pull-model propagation allows hub tenant
CVE-2026-725089.9 CRITICALMulticloud-operators-subscription: multicloud-operators-subscription: hub and spoke servic
CVE-2026-732689.9 CRITICALCluster-curator-controller: cluster-curator-controller: spec.install.overridejob allows ar
CVE-2026-732699.9 CRITICALCluster-curator-controller: cluster-curator-controller: tenant-controllable trigger create
CVE-2026-703989.6 CRITICALMulticloud-integrations: multicloud-integrations: gitopscluster.spec.argoserver.argonamesp
CVE-2026-714719.0 CRITICALAcm-search-v2-rhel9: search-v2-operator: hub search cr collector.imageoverride propagated
CVE-2026-136228.8 HIGHKubevirt: virt-handler-rhel9: kubevirt: virt-handler migration proxy follows symlinks allo
CVE-2026-714738.5 HIGHAcm-search-v2-rhel9: search-v2-operator: addonfactory.getvaluesfromaddonannotation enables
CVE-2026-731227.7 HIGHMulticloud-operators-channel: multicloud-operators-channel: auto-generated role grants eve
CVE-2026-668787.7 HIGHMulticloud-operators-subscription: multicloud-operators-subscription: fetchchannelreferenc
CVE-2026-196547.5 HIGHRsyslog: a configuration-dependent issue in rsyslog's optional imptcp input module can all
CVE-2026-714697.5 HIGHAcm-search-v2-api-rhel9: search-v2-api: unbounded tokenreviews cache allows unauthenticate
CVE-2026-187266.5 MEDIUMOpen-iscsi: open-iscsi: denial of service in iscsiuio router advertisement parsing
CVE-2026-718466.5 MEDIUMInsights-client: insights-client: clusterrole grants cluster-wide secrets get/list/watch b
CVE-2026-649276.4 MEDIUMMulticloud-operators-channel: multicloud-operators-channel: cross-namespace secret and con
CVE-2026-186635.9 MEDIUM389-ds-base: 389-ds-base: pre-authentication double-free in get_ldapmessage_controls_ext()
CVE-2026-191305.8 MEDIUMProvider-credential-controller: provider-credential-controller: cross-namespace credential
CVE-2026-195485.5 MEDIUMBinutils: binutils: multiple use-after-free in add_archive_element via lto plugin processi

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-191

V. Comments for CVE-2026-18727

No comments yet

Leave a comment