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CVE-2026-18726

CVE-2026-18726 · Open-iscsi: open-iscsi: denial of service in iscsiuio router advertisement parsing

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 6.5 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • red hat enterprise linux 10

    No fix published

  • red hat enterprise linux 9

    No fix published

  • open-iscsi Debian:12

    Versions
    • 2.1.8-1
    Affected ranges
    • ECOSYSTEM: < 2.1.8-1+deb12u1

    Update to 2.1.8-1+deb12u1

  • open-iscsi Debian:13

    Versions
    • 2.1.11-1
    • 2.1.11-1+deb13u1
    • 2.1.11-1+deb13u2
    • 2.1.11-2
    • 2.1.11-3
    • 2.1.11-4
    • 2.1.11-5
    • 2.1.11-6
    • 2.1.12-1
    • 2.1.12-2
    • 2.1.13-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • open-iscsi Debian:14

    Versions
    • 2.1.11-1
    • 2.1.11-2
    • 2.1.11-3
    • 2.1.11-4
    • 2.1.11-5
    • 2.1.11-6
    • 2.1.12-1
    • 2.1.12-2
    Affected ranges
    • ECOSYSTEM: < 2.1.13-1

    Update to 2.1.13-1

  • open-iscsi Ubuntu:14.04:LTS

    Versions
    • 2.0.873-3ubuntu7
    • 2.0.873-3ubuntu8
    • 2.0.873-3ubuntu9
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • open-iscsi Ubuntu:Pro:16.04:LTS

    Versions
    • 2.0.873-3ubuntu13
    • 2.0.873+git0.3b4b4500-13ubuntu3
    • 2.0.873+git0.3b4b4500-14ubuntu1
    • 2.0.873+git0.3b4b4500-14ubuntu3
    • 2.0.873+git0.3b4b4500-14ubuntu3.1
    • 2.0.873+git0.3b4b4500-14ubuntu3.2
    • 2.0.873+git0.3b4b4500-14ubuntu3.3
    • 2.0.873+git0.3b4b4500-14ubuntu3.4
    • 2.0.873+git0.3b4b4500-14ubuntu3.5
    • 2.0.873+git0.3b4b4500-14ubuntu3.6
    • 2.0.873+git0.3b4b4500-14ubuntu3.7
    • 2.0.873+git0.3b4b4500-14ubuntu3.7+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • open-iscsi Ubuntu:Pro:18.04:LTS

    Versions
    • 2.0.874-4ubuntu3
    • 2.0.874-4ubuntu4
    • 2.0.874-4ubuntu5
    • 2.0.874-5ubuntu1
    • 2.0.874-5ubuntu2
    • 2.0.874-5ubuntu2.1
    • 2.0.874-5ubuntu2.2
    • 2.0.874-5ubuntu2.3
    • 2.0.874-5ubuntu2.4
    • 2.0.874-5ubuntu2.6
    • 2.0.874-5ubuntu2.7
    • 2.0.874-5ubuntu2.9
    • 2.0.874-5ubuntu2.10
    • 2.0.874-5ubuntu2.11
    • 2.0.874-5ubuntu2.11+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • open-iscsi Ubuntu:20.04:LTS

    Versions
    • 2.0.874-7.1ubuntu3
    • 2.0.874-7.1ubuntu5
    • 2.0.874-7.1ubuntu6
    • 2.0.874-7.1ubuntu6.1
    • 2.0.874-7.1ubuntu6.2
    • 2.0.874-7.1ubuntu6.3
    • 2.0.874-7.1ubuntu6.4
    • 2.0.874-7.1ubuntu6.5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • open-iscsi Ubuntu:22.04:LTS

    Versions
    • 2.1.4-0ubuntu1
    • 2.1.4-0ubuntu2
    • 2.1.4-0ubuntu3
    • 2.1.4-0ubuntu4
    • 2.1.5-1ubuntu1
    • 2.1.5-1ubuntu1.1
    • 2.1.5-1ubuntu1.3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • open-iscsi Ubuntu:24.04:LTS

    Versions
    • 2.1.8-1ubuntu2
    • 2.1.9-3ubuntu1
    • 2.1.9-3ubuntu2
    • 2.1.9-3ubuntu3
    • 2.1.9-3ubuntu4
    • 2.1.9-3ubuntu5.1
    • 2.1.9-3ubuntu5.2
    • 2.1.9-3ubuntu5.3
    • 2.1.9-3ubuntu5.4
    • 2.1.9-3ubuntu5.5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • open-iscsi Ubuntu:26.10

    Versions
    • 2.1.11-3ubuntu3
    • 2.1.11-5ubuntu1
    • 2.1.11-5ubuntu4
    • 2.1.11-5ubuntu5
    • 2.1.11-5ubuntu6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • open-iscsi Ubuntu:26.04:LTS

    Versions
    • 2.1.11-1ubuntu3
    • 2.1.11-3ubuntu1
    • 2.1.11-3ubuntu2
    • 2.1.11-3ubuntu3
    • 2.1.11-3ubuntu3.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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