CVE-2026-18726 — MEDIUM (6.5)

Vulnerability 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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Redhat	Enterprise Linux	9.0

Related Weaknesses (CWE)

CWE-835

References

https://access.redhat.com/security/cve/CVE-2026-18726Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2462331Issue Tracking

FAQ

What is CVE-2026-18726?

CVE-2026-18726 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 ...

How severe is CVE-2026-18726?

CVE-2026-18726 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18726?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Enterprise Linux.