https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Sun, 04 Oct 2026 02:22:19 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-336692 EUVD-2026-336692 https://cve.radiocsirt.org/vuln/euvd-2026-336692 https://cve.radiocsirt.org/vuln/fkie_cve-2026-29008 <p>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.</p> <p>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.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2026-29008 https://cve.radiocsirt.org/vuln/ghsa-3qwj-q697-4ppr <p>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.</p> <p>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.</p> https://cve.radiocsirt.org/vuln/ghsa-3qwj-q697-4ppr https://cve.radiocsirt.org/vuln/ubuntu-cve-2026-29008 <p><strong>Affected:</strong> Ubuntu:16.04:LTS: u-boot, Ubuntu:18.04:LTS: u-boot, Ubuntu:20.04:LTS: u-boot, Ubuntu:22.04:LTS: u-boot, Ubuntu:22.04:LTS: u-boot-nezha, Ubuntu:24.04:LTS: u-boot, Ubuntu:24.04:LTS: u-boot-nezha, Ubuntu:25.10: u-boot, Ubuntu:26.04:LTS: u-boot</p> <p>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.</p> <p><strong>Affected:</strong> Ubuntu:16.04:LTS: u-boot, Ubuntu:18.04:LTS: u-boot, Ubuntu:20.04:LTS: u-boot, Ubuntu:22.04:LTS: u-boot, Ubuntu:22.04:LTS: u-boot-nezha, Ubuntu:24.04:LTS: u-boot, Ubuntu:24.04:LTS: u-boot-nezha, Ubuntu:25.10: u-boot, Ubuntu:26.04:LTS: u-boot</p> <p>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.</p> https://cve.radiocsirt.org/vuln/ubuntu-cve-2026-29008 https://cve.radiocsirt.org/vuln/wid-sec-w-2026-2306 <p>Ein Angreifer aus einem angrenzenden Netzwerk kann mehrere Schwachstellen in DENX U-Boot ausnutzen, um einen Denial of Service Angriff durchzuführen und beliebigen Code auszuführen.</p> <p>Ein Angreifer aus einem angrenzenden Netzwerk kann mehrere Schwachstellen in DENX U-Boot ausnutzen, um einen Denial of Service Angriff durchzuführen und beliebigen Code auszuführen.</p> https://cve.radiocsirt.org/vuln/wid-sec-w-2026-2306