Issue with FreeRTOS-Plus-TCP - MAC Address Validation Bypass and ICMP Echo Reply Integer Underflow
摘要
FreeRTOS-Plus-TCP is a scalable, open source, and thread-safe TCP/IP stack for FreeRTOS. - CVE-2026-7422: Insufficient packet validation in the IPv4 and IPv6 receive paths allows an adjacent network device to send a packet that bypasses checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the target device's own registered endpoints. - CVE-2026-7423: Integer underflow in the ICMP and ICMPv6 echo reply handlers allows an adjacent network device to cause a denial of service (device crash) when outgoing ping support is enabled, because header sizes are subtracted from a packet length field without validating the field is large enough, resulting in a heap out-of-bounds read.
正文
Bulletin ID: 2026-021-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 2026/04/29 12:00 PM PDT Description: FreeRTOS-Plus-TCP is a scalable, open source, and thread-safe TCP/IP stack for FreeRTOS. - CVE-2026-7422: Insufficient packet validation in the IPv4 and IPv6 receive paths allows an adjacent network device to send a packet that bypasses checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the target device's own registered endpoints. - CVE-2026-7423: Integer underflow in the ICMP and ICMPv6 echo reply handlers allows an adjacent network device to cause a denial of service (device crash) when outgoing ping support is enabled, because header sizes are subtracted from a packet length field without validating the field is large enough, resulting in a heap out-of-bounds read. Impacted versions: >=V4.0.0 AND <=V4.2.5, >=V4.3.0 AND <=V4.4.0 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
标签
- bulletin:2026-021-aws
- severity:important-requires-attention
- vendor:aws
扩展字段
{
"author": "[email protected]",
"bulletin_id": "2026-021-AWS",
"content_type": "Important (requires attention)",
"details": {
"Bulletin ID": "2026-021-AWS",
"Content Type": "Important (requires attention)",
"Impacted versions": ">=V4.0.0 AND <=V4.2.5, >=V4.3.0 AND <=V4.4.0",
"Publication Date": "2026/04/29 12:00 PM PDT",
"Scope": "AWS"
},
"publication_detail": "2026/04/29 12:00 PM PDT",
"scope": "AWS"
}