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Fencer Vulns
high 7.1

CVE-2026-115486 json

Open-iscsi: open-iscsi: ipv6 neighbor discovery missing option length validation in iscsiuio allows arp table poisoning

published 2026-10-23 17 d ago modified 2026-11-05 3 d ago also EUVD-2026-108557

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-115486 updated cvss 7.1

open-iscsi: open-iscsi: IPv6 Neighbor Discovery missing option length validation in iscsiuio allows ARP table poisoning

  • Red Hat Enterprise Linux 7 iscsi-initiator-utils-iscsiuio, iscsi-initiator-utils 6.2.1.11-1.git4b3e853.el10_2.2 Red Hat Enterprise Linux 8 iscsi-initiator-utils, python3-iscsi-initiator-utils, iscsi-initiator-utils-iscsiuio, iscsi-initiator-utils 6.2.1.11-1.git4b3e853.el10_2.2 Red Hat Enterprise Linux 9 iscsi-initiator-utils, python3-iscsi-initiator-utils, iscsi-initiator-utils-iscsiuio, iscsi-initiator-utils 6.2.1.11-1.git4b3e853.el10_2.2 Red Hat Enterprise Linux 10 iscsi-initiator-utils 6.2.1.11-1.git4b3e853.el10_2.2
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 6 iscsi-initiator-utils 6.2.1.11-1.git4b3e853.el10_2.2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6 d ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness

References

Sources

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