CVE-2026-29009— U-Boot 缓冲区错误漏洞

U-Boot 2026.04-rc3 Buffer Overflow in nfs_readlink_reply() via NFS READLINK

U-Boot through 2026.04-rc3 contains a buffer overflow vulnerability in nfs_readlink_reply() (net/nfs-common.c) when CONFIG_CMD_NFS is enabled, allowing a malicious or compromised NFS server to overflow the 2048-byte nfs_path_buff buffer by returning multiple relative symlink targets that are appended without cumulative length validation. Attackers can send two or more READLINK responses containing relative symlink targets of approximately 1100 bytes each to corrupt adjacent BSS variables including nfs_server_ip, nfs_server_mount_port, nfs_server_port, nfs_our_port, nfs_state, and rpc_id, potentially achieving memory corruption and control over the NFS client state machine.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)

U-Boot 缓冲区错误漏洞

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及之前版本存在缓冲区错误漏洞，该漏洞源于nfs_readlink_reply()函数存在缓冲区溢出，允许恶意或受攻击的NFS服务器通过返回多个相对符号链接目标（每个约1100字节）溢出2048字节的nfs_path_buff缓冲区，导致内存

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