CVE-2026-115484: Open-iscsi: open-iscsi: dhcpv4 option parser heap out-of-bounds read in iscsiuio parse_msg

Description

A flaw was found in the iscsiuio component of open-iscsi. The DHCPv4 option parser incorrectly calculates the length of the options data, causing it to read beyond the allocated buffer into adjacent heap memory. An attacker on the same network segment can send a crafted DHCP response to crash the daemon or corrupt its network configuration.

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Attack vector

Adjacent

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

Low

Integrity

Low

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.2% · higher than 13% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

RH

Red Hat Enterprise Linux 10 · Red Hat

All versions, or not specified · source: vendor

RH

Red Hat Enterprise Linux 7 · Red Hat

All versions, or not specified · source: vendor

RH

Red Hat Enterprise Linux 8 · Red Hat

All versions, or not specified · source: vendor

RH

Red Hat Enterprise Linux 9 · Red Hat

All versions, or not specified · source: vendor