CVE-2026-34961— barebox ext4 Extent Parsing Out-of-Bounds Read
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-34961
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
barebox ext4 Extent Parsing Out-of-Bounds Read
Source: NVD (National Vulnerability Database)
Vulnerability Description
barebox prior to version 2026.04.0 contains out-of-bounds read vulnerabilities in ext4 extent parsing due to missing validation of the eh_entries field against buffer capacity in fs/ext4/ext4_common.c. Attackers can supply a malicious ext4 filesystem image via USB, SD card, or network boot to trigger heap out-of-bounds reads during boot-time filesystem parsing, potentially redirecting reads to arbitrary disk offsets.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/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ext4 extent解析中未验证eh_entries字段与缓冲区容量，可能导致攻击者提供恶意ext4文件系统镜像触发堆越界读取并可能重定向读取到任意磁盘偏移。
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-2026-34961
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-34961
请登录查看更多情报信息。
Same Patch Batch · barebox · 2026-05-11 · 4 CVEs total
| CVE-2026-34963 | 8.4 HIGH | barebox EFI PE Loader Memory Safety Vulnerabilities |
| CVE-2026-34960 | 6.5 MEDIUM | barebox Out-of-Bounds Read in DHCP Option Parsing |
| CVE-2026-34962 | 6.2 MEDIUM | barebox ext4 Directory Parsing Infinite Loop Denial of Service |
IV. Related Vulnerabilities
Same product: barebox
V. Comments for CVE-2026-34961
No comments yet