漏洞信息
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Vulnerability Title
U-Boot 2026.04-rc3 Integer Underflow DoS via tcp_rx_state_machine()
Vulnerability Description
U-Boot through 2026.04-rc3 contains an integer underflow vulnerability in the tcp_rx_state_machine() function (net/tcp.c) that allows a network-adjacent attacker to crash the bootloader by sending a malformed TCP SYN+ACK packet with a manipulated data offset field causing payload_len to become negative. When the TCP_SYN_SENT handler calls tcp_rx_user_data() without invoking tcp_seg_in_wnd() validation, the negative payload_len is implicitly converted to a large unsigned integer (e.g., 0xFFFFFFD8) and passed to memcpy() in store_block(), causing an immediate crash that prevents device boot and may enable memory corruption when CONFIG_LMB is disabled.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability Type
整数下溢(超界折返)
Vulnerability Title
U-Boot 数字错误漏洞
Vulnerability Description
U-Boot U-Boot是U-Boot社区开源的一个免费、开源且可扩展的引导加载程序,适用于多种架构(ARM、MIPS、PowerPC、RISC-V、x86、x86_64),其目的是执行各种硬件初始化任务并启动设备的操作系统内核。 U-Boot 2026.04-rc3及之前版本存在数字错误漏洞,该漏洞源于tcp_rx_state_machine()函数中存在整数下溢,网络邻近攻击者通过发送数据偏移字段被操纵的畸形TCP SYN+ACK数据包导致payload_len变为负数,从而引发引导加载程序崩溃并可
CVSS Information
N/A
Vulnerability Type
N/A