CVE-2026-34960— barebox Out-of-Bounds Read in DHCP Option Parsing
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-34960
Vulnerability Information
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Vulnerability Title
barebox Out-of-Bounds Read in DHCP Option Parsing
Source: NVD (National Vulnerability Database)
Vulnerability Description
barebox prior to version 2026.04.0 contains an out-of-bounds read vulnerability in DHCP option parsing within the dhcp_message_type() function that fails to verify the options pointer remains within received packet bounds. An attacker on the same broadcast domain can send a crafted DHCP Offer or ACK packet without a proper 0xff end marker to cause the parser to read past valid packet data and potentially crash the system.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
Vulnerability Title
Barebox 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Barebox是Barebox开源的一个多功能且灵活的引导加载程序。 barebox 2026.04.0之前版本存在缓冲区错误漏洞，该漏洞源于DHCP选项解析中dhcp_message_type()函数未验证选项指针是否在接收数据包边界内，可能导致攻击者发送特制DHCP Offer或ACK数据包导致越界读取并可能使系统崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-34960
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · barebox · 2026-05-11 · 4 CVEs total
| CVE-2026-34963 | 8.4 HIGH | barebox EFI PE Loader Memory Safety Vulnerabilities |
| CVE-2026-34962 | 6.2 MEDIUM | barebox ext4 Directory Parsing Infinite Loop Denial of Service |
| CVE-2026-34961 | 6.2 MEDIUM | barebox ext4 Extent Parsing Out-of-Bounds Read |
IV. Related Vulnerabilities
Same product: barebox
V. Comments for CVE-2026-34960
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