CVE-2026-29008 U-Boot 2026.04-rc3 Integer Underflow DoS via tcp_rx_state_machine()

U-Boot through 2026.04-rc3 contains an integer underflow vulnerability in the tcprxstatemachine 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 payloadlen to become negative...

PT-2026-56474

Name of the Vulnerable Software and Affected Versions U-Boot versions prior to 2026.04-rc4 Description An out-of-bounds read occurs in the tcp rx state machine function net/tcp.c when CONFIG PROT TCP is enabled. A remote attacker can read beyond TCP segment boundaries by sending a malicious packe...