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CVE-2026-16140— OpenBMC IPMI Privilege Escalation via Retargeted RAKP 1

Quick assessment

Affected
OpenBMC phosphor-net-ipmid
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.

OpenBMC 的 IPMI 实现（phosphor-net-ipmid）存在一个逻辑缺陷，允许将现有会话的授权上下文替换为目标账户，同时保留原有的完整性和加密密钥。多家下游厂商（如 NVIDIA 和 H3C）在其 IPMI 协议栈中采用了 phosphor-net-ipmid。该漏洞实际效果是，攻击者无需重新认证即可实现权限提升。

CVSS 8.8 · High
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I. Basic Information for CVE-2026-16140

Vulnerability Information
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Vulnerability Title
OpenBMC IPMI Privilege Escalation via Retargeted RAKP 1
Source: CVE Program / CVE List V5
Vulnerability Description
OpenBMC's IPMI implementation, phosphor-net-ipmid, is vulnerable to a logic flaw where the authorization context of an existing session can be replaced with a target account while still maintaining the original integrity and encryption keys. Several downstream vendors implement phosphor-net-ipmid as their IPMI stack, such as NVIDIA and H3C. This issue effectively allows for privilege escalation without re-authentication.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenBMC phosphor-net-ipmid 0 ~ ba6efc502e6b1fabb8ed1ca677ae5eedd64b6361 -

II. Public POCs for CVE-2026-16140

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III. Intelligence Information for CVE-2026-16140

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Vendor Advisories for CVE-2026-16140 (1)

Security Blog Posts for CVE-2026-16140 (1)

IV. Related Vulnerabilities

Same product: phosphor-net-ipmid
Same vendor: OpenBMC
Same weakness: CWE-863

V. Comments for CVE-2026-16140

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