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.
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Affected Vendors & Products
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History
Thu, 13 Aug 2026 20:30:00 +0000
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ssvc
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Thu, 13 Aug 2026 12:15:00 +0000
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threat_severity
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threat_severity
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Wed, 12 Aug 2026 21:30:00 +0000
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| 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. | |
| Title | Open-iscsi: open-iscsi: integer underflow in iscsiuio dhcpv6 parsing | |
| First Time appeared |
Redhat
Redhat enterprise Linux |
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| Weaknesses | CWE-191 | |
| CPEs | cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:9 |
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| Vendors & Products |
Redhat
Redhat enterprise Linux |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published: 2026-08-12T21:13:51.915Z
Updated: 2026-08-18T14:37:32.054Z
Reserved: 2026-08-03T17:55:54.164Z
Link: CVE-2026-18727
Updated: 2026-08-13T19:22:01.071Z
Status : Awaiting Analysis
Published: 2026-08-12T22:17:14.697
Modified: 2026-08-14T19:07:46.080
Link: CVE-2026-18727