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CVE-2026-115485— Open-iscsi: open-iscsi: dhcpv6 vendor option strlen heap out-of-bounds read and 1-byte write in iscsiuio

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 组件中发现了一个安全漏洞。该组件的 DHCPv6 选项解析器在未确保存在 NUL 终止符的情况下，对原始网络数据调用了 strlen() 函数，导致其读取超出缓冲区范围，进入堆内存。这可能导致守护进程崩溃、1 字节的堆覆盖，或 iSCSI 发起器名称被篡改。同一网段内的攻击者可通过发送精心构造的 DHCPv6 Advertise 消息来触发此漏洞。

CVSS 6.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-115485

Vulnerability Information
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Vulnerability Title
Open-iscsi: open-iscsi: dhcpv6 vendor option strlen heap out-of-bounds read and 1-byte write in iscsiuio
Source: CVE Program / CVE List V5
Vulnerability Description
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.
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:L
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-2026-115485

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III. Intelligence Information for CVE-2026-115485

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Vendor Advisories for CVE-2026-115485 (1)

Other References for CVE-2026-115485 (1)

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

CVE-2026-115484 7.6 HIGH Open-iscsi: open-iscsi: dhcpv4 option parser heap out-of-bounds read in iscsiuio parse_msg
CVE-2026-115486 7.1 HIGH Open-iscsi: open-iscsi: ipv6 neighbor discovery missing option length validation in iscsiu

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-115485

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