CVE-2026-18726
CVE-2026-18726: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium6.5
Medium [CVE-2026-18726] Denial of service in iscsiuio Router Advertisement parsing
CVE-2026-18726Source published Source updated
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. Moderate: This flaw in `iscsiuio` can lead to a denial of service when processing a specially crafted ICMPv6 Router Advertisement. Exploitation requires an attacker to be on the same Layer 2 network segment as…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat package: iscsi-initiator-utils
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- To mitigate this issue, restrict ICMPv6 Router Advertisements from untrusted sources on any network segment where `iscsiuio` interfaces are exposed. Alternatively, disable IPv6 Router Advertisement processing on affected interfaces if not operationally required. This may involve configuring firewall rules to filter ICMPv6 type 134 messages or adjusting network interface settings to prevent RA-driven IPv6 configuration. A service restart may be required for changes to take effect.
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