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

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 open-iscsi 的 iscsiuio 组件中发现了一个漏洞。该组件中的 DHCPv4 选项解析器错误地计算了选项数据的长度，导致其读取超出已分配缓冲区，访问相邻的堆内存。同一网段中的攻击者可发送特制的 DHCP 响应，致使守护进程崩溃或破坏其网络配置。

CVSS 7.6 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-115484

Vulnerability Information
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Vulnerability Title
Open-iscsi: open-iscsi: dhcpv4 option parser heap out-of-bounds read in iscsiuio parse_msg
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-115484

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III. Intelligence Information for CVE-2026-115484

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Vendor Advisories for CVE-2026-115484 (1)

Other References for CVE-2026-115484 (1)

Same Patch Batch · Red Hat · 2026-10-23 · 3 CVEs total

CVE-2026-115486 7.1 HIGH Open-iscsi: open-iscsi: ipv6 neighbor discovery missing option length validation in iscsiu
CVE-2026-115485 6.3 MEDIUM Open-iscsi: open-iscsi: dhcpv6 vendor option strlen heap out-of-bounds read and 1-byte wri

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-125

V. Comments for CVE-2026-115484

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