{"id":"CVE-2026-115486","aliases":["AZL-111392","DEBIAN-CVE-2026-115486","EUVD-2026-108557","GHSA-9f4r-jjqf-4v98","UBUNTU-CVE-2026-115486"],"status":"published","title":"Open-iscsi: open-iscsi: ipv6 neighbor discovery missing option length validation in iscsiuio allows arp table poisoning","description":"A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler accesses link-layer address options at a fixed offset without verifying the packet contains them. Additionally, the ARP table is updated unconditionally with attacker-controlled addresses from the packet headers. An attacker on the same network segment can send a minimal Neighbor Advertisement to poison the ARP table and redirect network traffic.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00207,"percentile":0.1084,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-10-23T00:16:34Z","modified":"2026-11-05T05:40:51Z","affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"iscsi-initiator-utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.1.12-1"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.10-1","2.1.10-2","2.1.10-3","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","2.1.13-1","2.1.8-1","2.1.8-1+deb12u1","2.1.8-2","2.1.9-1","2.1.9-2","2.1.9-3","2.1.9-4"]},{"source":"osv","ecosystem":"Debian:13","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"]},{"source":"osv","ecosystem":"Debian:14","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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","2.1.13-1"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.873-3ubuntu7","2.0.873-3ubuntu8","2.0.873-3ubuntu9"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.11-3ubuntu3","2.1.11-5ubuntu1","2.1.11-5ubuntu4","2.1.11-5ubuntu5","2.1.11-5ubuntu6"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"open-iscsi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.11-1ubuntu3","2.1.11-3ubuntu1","2.1.11-3ubuntu2","2.1.11-3ubuntu3","2.1.11-3ubuntu3.1"]}],"products":[{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 6"},{"vendor":"red hat","product":"red hat enterprise linux 7"},{"vendor":"red hat","product":"red hat enterprise linux 8"},{"vendor":"red hat","product":"red hat enterprise linux 9"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-115486","tags":["vdb-entry","x_refsource_REDHAT","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2556267","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115486","tags":["web"]},{"url":"https://github.com/advisories/GHSA-9f4r-jjqf-4v98"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-115486","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-115486","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-115486","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-115486","title":"Open-iscsi: open-iscsi: ipv6 neighbor discovery missing option length validation in iscsiuio allows arp table poisoning","description":"A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler accesses link-layer address options at a fixed offset without verifying the packet contains them. Additionally, the ARP table is updated unconditionally with attacker-controlled addresses from the packet headers. An attacker on the same network segment can send a minimal Neighbor Advertisement to poison the ARP table and redirect network traffic.","status":"published","published":"2026-10-23T00:16:34.25Z","modified":"2026-11-05T16:23:19.313Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-05T17:53:58.925122Z"}],"euvd":[{"id":"EUVD-2026-108557","description":"A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler accesses link-layer address options at a fixed offset without verifying the packet contains them. Additionally, the ARP table is updated unconditionally with attacker-controlled addresses from the packet headers. An attacker on the same network segment can send a minimal Neighbor Advertisement to poison the ARP table and redirect network traffic.","status":"published","published":"2026-10-23T00:16:34Z","modified":"2026-11-05T16:23:19Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","level":"high"}],"updated_at":"2026-11-05T18:00:58.377138Z"}],"ghsa":[{"id":"GHSA-9f4r-jjqf-4v98","title":"A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler...","description":"A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler accesses link-layer address options at a fixed offset without verifying the packet contains them. Additionally, the ARP table is updated unconditionally with attacker-controlled addresses from the packet headers. An attacker on the same network segment can send a minimal Neighbor Advertisement to poison the ARP table and redirect network traffic.","status":"published","published":"2026-10-23T03:30:22Z","modified":"2026-10-23T03:30:24Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:14:18.846384Z"}],"nvd":[{"id":"CVE-2026-115486","description":"A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler accesses link-layer address options at a fixed offset without verifying the packet contains them. Additionally, the ARP table is updated unconditionally with attacker-controlled addresses from the packet headers. An attacker on the same network segment can send a minimal Neighbor Advertisement to poison the ARP table and redirect network traffic.","status":"published","published":"2026-10-23T01:16:53.943Z","modified":"2026-11-05T17:17:41.777Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","level":"high","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-05T19:56:06.044988Z"}],"osv":[{"id":"DEBIAN-CVE-2026-115486","description":"A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler accesses link-layer address options at a fixed offset without verifying the packet contains them. Additionally, the ARP table is updated unconditionally with attacker-controlled addresses from the packet headers. An attacker on the same network segment can send a minimal Neighbor Advertisement to poison the ARP table and redirect network traffic.","status":"published","published":"2026-10-23T01:16:53.943Z","modified":"2026-11-03T09:47:33.482039995Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","level":"high"}],"updated_at":"2026-11-03T10:27:58.933618Z"},{"id":"UBUNTU-CVE-2026-115486","description":"A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler accesses link-layer address options at a fixed offset without verifying the packet contains them. Additionally, the ARP table is updated unconditionally with attacker-controlled addresses from the packet headers. An attacker on the same network segment can send a minimal Neighbor Advertisement to poison the ARP table and redirect network traffic.","status":"published","published":"2026-10-23T01:16:00Z","modified":"2026-10-28T17:50:38Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T16:56:00.081948Z"},{"id":"AZL-111392","title":"CVE-2026-115486 affecting package iscsi-initiator-utils 2.1.12-1","description":"A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler accesses link-layer address options at a fixed offset without verifying the packet contains them. Additionally, the ARP table is updated unconditionally with attacker-controlled addresses from the packet headers. An attacker on the same network segment can send a minimal Neighbor Advertisement to poison the ARP table and redirect network traffic.","status":"published","published":"2026-10-23T01:16:53Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:18.705965Z"}]}}