CVE-2026-29008
Description
A flaw was found in U-Boot. A network-adjacent attacker can exploit an integer underflow vulnerability in the tcp_rx_state_machine() function by sending a specially crafted TCP SYN+ACK packet. This can cause the bootloader to crash, leading to a Denial of Service (DoS) and preventing the device from booting. In certain configurations, this flaw may also enable memory corruption.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
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