CVE-2026-7422— MAC Address Validation Bypass in FreeRTOS-Plus-TCP IPv4 and IPv6 Packet Processing
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-7422
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View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
MAC Address Validation Bypass in FreeRTOS-Plus-TCP IPv4 and IPv6 Packet Processing
Source: NVD (National Vulnerability Database)
Vulnerability Description
Insufficient packet validation in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to bypass all checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the device's own registered endpoints, because the loopback detection mechanism skips all input validation for packets whose source MAC matches a local endpoint. To mitigate this issue, users should upgrade to the fixed version when available.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用欺骗进行的认证绕过
Source: NVD (National Vulnerability Database)
Vulnerability Title
FreeRTOS-Plus-TCP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeRTOS-Plus-TCP是FreeRTOS开源的一种适用于 FreeRTOS 的可扩展的开源和线程安全 TCP/IP 堆栈。 FreeRTOS-Plus-TCP V4.2.6之前版本和V4.4.1之前版本存在安全漏洞，该漏洞源于数据包验证不足，可能导致相邻网络参与者通过伪造以太网源MAC地址绕过所有校验和及最小大小验证。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| AWS | FreeRTOS-Plus-TCP | 4.0.0 ~ 4.2.6 | - |
II. Public POCs for CVE-2026-7422
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-7422
请登录查看更多情报信息。
Same Patch Batch · AWS · 2026-04-29 · 5 CVEs total
| CVE-2026-7424 | 8.1 HIGH | Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Plus-TCP |
| CVE-2026-7426 | 8.1 HIGH | Out-of-Bounds Write via Unsanitized Prefix Length in Router Advertisement Processing in Fr |
| CVE-2026-7425 | 6.5 MEDIUM | Out-of-Bounds Read in Router Advertisement Option Parser in FreeRTOS-Plus-TCP |
| CVE-2026-7423 | 5.3 MEDIUM | Integer Underflow in ICMP Echo Reply Processing in FreeRTOS-Plus-TCP |
IV. Related Vulnerabilities
Same product: FreeRTOS-Plus-TCP
- CVE-2026-7426
Out-of-Bounds Write via Unsanitized Prefix Length in Router - CVE-2026-7425
Out-of-Bounds Read in Router Advertisement Option Parser in - CVE-2026-7424
Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Pl - CVE-2026-7423
Integer Underflow in ICMP Echo Reply Processing in FreeRTOS- - CVE-2025-11618
Invalid Pointer Dereference when receiving UDP/IPv6 packets
Same vendor: AWS
- CVE-2026-7461
OS Command Injection in Amazon ECS Agent via FSx Windows Fil - CVE-2026-7426
Out-of-Bounds Write via Unsanitized Prefix Length in Router - CVE-2026-7425
Out-of-Bounds Read in Router Advertisement Option Parser in - CVE-2026-7424
Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Pl - CVE-2026-7423
Integer Underflow in ICMP Echo Reply Processing in FreeRTOS-
Same weakness: CWE-290
- CVE-2021-47923
OpenCart 3.0.3.8 Session Fixation via OCSESSID Cookie - CVE-2026-42354
Sentry: Improper authentication on SAML SSO process allows u - CVE-2026-44118
OpenClaw < 2026.4.22 - Owner Context Spoofing via Bearer Tok - CVE-2026-39858
Traefik: Forwarded alias spoofing top pre-auth decision bypa - CVE-2018-25317
Tenda W3002R/A302/W309R V5.07.64_en Cookie Session Weakness
V. Comments for CVE-2026-7422
No comments yet