Red HatCVE-2026-18726
Red Hat open-iscsi. This vulnerability: denial of service
Medium6.5CVE-2026-18726 · Published Aug 12, 2026 · updated Aug 25, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-835
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 12 | Red Hat: mass assignment | High8.5 | No fix yet |
| Aug 12 | Red Hat insights-client. The: excessive privileges | Medium6.5 | No fix yet |
| Aug 12 | Red Hat search-v2-api: denial of service | High7.5 | No fix yet |
| Aug 12 | Red Hat acm-search-v2-rhel9: remote code execution | Critical9.0 | No fix yet |
| Aug 12 | Red Hat open-iscsi: integer overflow | Medium6.5 | No fix yet |
| Aug 12 | Red Hat Enterprise Linux: privilege escalation | High7.5 | No fix yet |