Threats Tagged 'cve-2026-29008'
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Threats Tagged 'cve-2026-29008'
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0 U-Boot versions through 2026.04-rc3 contain an integer underflow vulnerability in the tcp_rx_state_machine() function. A network-adjacent attacker can send a malformed TCP SYN+ACK packet with a manipulated data offset field, causing the payload length to become negative. This negative value is converted to a large unsigned integer and passed to memcpy(), resulting in an immediate crash of the bootloader that prevents device boot. If CONFIG_LMB is disabled, this may also lead to memory corruption. Join the discussion | GCVE Database | 07/08/2026, 18:31:37 UTC Added: 07/14/2026, 09:21:29 UTC |
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. Join the discussion | GCVE Database | 07/08/2026, 17:17:00 UTC Added: 07/16/2026, 10:39:20 UTC |
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