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CVE-2026-18725 is an out-of-bounds memory access vulnerability in the IPv6 ICMPv6 echo handling of iscsiuio, a component of open-iscsi. Affected packages include open-iscsi on Debian 12 Bookworm and iscsi-initiator-utils on Amazon Linux 2 and Amazon Linux 2023. The precise triggering condition, whether the access is a read or write, and the resulting security impact are currently not available.
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No public exploit code observed for this vulnerability.
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An out-of-bounds access vulnerability in open-iscsi's IPv6 ICMPv6 echo handling. The advisory does not specify its impact. It is fixed in Debian 12 package version 2.1.8-1+deb12u1.
An out-of-bounds access vulnerability in open-iscsi's iscsiuio component when handling ICMPv6 echo traffic.
An out-of-bounds access vulnerability in open-iscsi's iscsiuio component during ICMPv6 echo handling.
A medium-severity out-of-bounds access vulnerability in open-iscsi's iscsiuio ICMPv6 echo handling. The reported Amazon Linux CVSS v3.1 score is 6.3 with network-adjacent attack vector (AV:A), low attack complexity, no privileges or user interaction required, and low confidentiality, integrity, and availability impact.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.