CVE-2026-7425— Out-of-Bounds Read in Router Advertisement Option Parser in FreeRTOS-Plus-TCP
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I. Basic Information for CVE-2026-7425
Vulnerability Information
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Vulnerability Title
Out-of-Bounds Read in Router Advertisement Option Parser in FreeRTOS-Plus-TCP
Source: NVD (National Vulnerability Database)
Vulnerability Description
Insufficient option length validation in the IPv6 Router Advertisement parser in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to cause a denial of service (device crash) by sending a crafted Router Advertisement with a truncated PREFIX_INFORMATION option that is smaller than the expected structure size. 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:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
Vulnerability Title
FreeRTOS-Plus-TCP 缓冲区错误漏洞
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之前版本存在缓冲区错误漏洞，该漏洞源于IPv6路由器通告解析器中的选项长度验证不足，可能导致相邻网络参与者造成拒绝服务。
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-2026-7425
| # | POC Description | Source Link | Shenlong Link |
|---|
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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-2026-7422 | 6.5 MEDIUM | MAC Address Validation Bypass in FreeRTOS-Plus-TCP IPv4 and IPv6 Packet Processing |
| 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-2026-7424
Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Pl - CVE-2026-7423
Integer Underflow in ICMP Echo Reply Processing in FreeRTOS- - CVE-2026-7422
MAC Address Validation Bypass in FreeRTOS-Plus-TCP IPv4 and - 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-2026-7424
Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Pl - CVE-2026-7423
Integer Underflow in ICMP Echo Reply Processing in FreeRTOS- - CVE-2026-7422
MAC Address Validation Bypass in FreeRTOS-Plus-TCP IPv4 and
Same weakness: CWE-125
- CVE-2026-8177
XML::LibXML versions through 2.0210 for Perl read out-of-bou - CVE-2026-6104
Global buffer over-read in mb_convert_encoding() with attack - CVE-2026-7258
Out-of-bounds read in urldecode() on NetBSD - CVE-2026-8186
Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out- - CVE-2026-3508
ASUS System Control Interface 缓冲区错误漏洞
V. Comments for CVE-2026-7425
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