Medium [CVE-2026-18725] Out-of-bounds access in iscsiuio ICMPv6 echo handling
This medium-severity Red Hat Linux advisory covers CVE-2026-18725 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat package: iscsi-initiator-utils.
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Summary
Out-of-bounds access in iscsiuio ICMPv6 echo handling. Red Hat rates this moderate (CVSS 6.3).
Weakness: CWE-787.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat package: iscsi-initiator-utils.
- 6.2.1.11-0
- 6.2.1.11
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- To mitigate this issue, ensure that `iscsiuio`-managed interfaces are restricted to trusted L2 network segments. If feasible for your operational environment, disable IPv6 on interfaces where `iscsiuio` is active and not strictly required to process IPv6 traffic. Alternatively, implement firewall rules to filter ICMPv6 Echo Requests before they reach the `iscsiuio` process on affected systems. Changes to network configurations may require a network service restart to take effect, which could temporarily impact network connectivity.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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