{"id":"CVE-2026-71971","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-71971","summary":"U-Boot before 2026.10-rc3 with CONFIG_IP_DEFRAG enabled contains an out-of-bounds write vulnerability in the __net_defragment() function in net/net.c. Remote attackers can send a crafted…","details":"U-Boot before 2026.10-rc3 with CONFIG_IP_DEFRAG enabled contains an out-of-bounds write vulnerability in the __net_defragment() function in net/net.c. Remote attackers can send a crafted IP fragment with non-zero offset and More-Fragments flag set during netboot to corrupt adjacent memory and crash the bootloader.","published":"2026-09-29T22:18:21.723","modified":"2026-09-29T22:18:21.723","cvss":{"score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/u-boot/u-boot/commit/04ca915d5bf39dda5d1bce62d04d2b59d293c5b9","label":"u-boot/u-boot@04ca915"},"references":[{"type":"WEB","url":"https://github.com/u-boot/u-boot"},{"type":"WEB","url":"https://github.com/u-boot/u-boot/blob/v2026.07/net/net.c#L975"},{"type":"WEB","url":"https://github.com/u-boot/u-boot/commit/04ca915d5bf39dda5d1bce62d04d2b59d293c5b9"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc3-out-of-bounds-write-in-ip-fragment-reassembly"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-29T22:18:21.723"}}