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Fencer Vulns
medium 6.3

CVE-2026-115485 json

Open-iscsi: open-iscsi: dhcpv6 vendor option strlen heap out-of-bounds read and 1-byte write in iscsiuio

published 2026-10-23 17 d ago modified 2026-11-05 3 d ago also EUVD-2026-108556

cvss
6.3
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 9%
public exploits
0
none known

Summary

A flaw was found in the iscsiuio component of open-iscsi. The DHCPv6 option parser calls strlen() on raw network data without ensuring a NUL terminator is present, causing it to read past the buffer into heap memory. This can result in a daemon crash, a 1-byte heap overwrite, or corruption of the iSCSI initiator name. An attacker on the same network segment can trigger this by sending a crafted DHCPv6 Advertise message.

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-2026-115485 updated cvss 6.3

open-iscsi: open-iscsi: DHCPv6 vendor option strlen heap out-of-bounds read and 1-byte write in iscsiuio

  • 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
11 d ago

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/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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