A flaw was found in open-iscsi. This vulnerability allows a remote attacker on the same local network segment to cause a Denial of Service (DoS) in the iscsiuio daemon. By sending a specially crafted Internet Control Message Protocol version 6 (ICMPv6) Router Advertisement with a zero-length option, the attacker can trigger an infinite loop. This leads to sustained CPU usage, rendering the daemon unresponsive and impacting system availability. A secondary risk of out-of-bounds reads exists with a short IPv6 payload, though no memory corruption or data exposure has been confirmed.
History

Thu, 13 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 13 Aug 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 13 Aug 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Redhat open Iscsi
Vendors & Products Redhat open Iscsi

Wed, 12 Aug 2026 21:30:00 +0000

Type Values Removed Values Added
Description A flaw was found in open-iscsi. This vulnerability allows a remote attacker on the same local network segment to cause a Denial of Service (DoS) in the iscsiuio daemon. By sending a specially crafted Internet Control Message Protocol version 6 (ICMPv6) Router Advertisement with a zero-length option, the attacker can trigger an infinite loop. This leads to sustained CPU usage, rendering the daemon unresponsive and impacting system availability. A secondary risk of out-of-bounds reads exists with a short IPv6 payload, though no memory corruption or data exposure has been confirmed.
Title Open-iscsi: open-iscsi: denial of service in iscsiuio router advertisement parsing
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-835
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-08-12T21:13:47.604Z

Updated: 2026-08-18T14:37:26.945Z

Reserved: 2026-08-03T17:55:50.945Z

Link: CVE-2026-18726

cve-icon Vulnrichment

Updated: 2026-08-13T13:42:54.098Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-12T22:17:14.557

Modified: 2026-08-14T19:07:46.080

Link: CVE-2026-18726

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-12T18:04:50Z

Links: CVE-2026-18726 - Bugzilla