{"id":"CVE-2026-71971","published":"2026-09-29T22:18:21.723","lastModified":"2026-09-29T22:18:21.723","description":"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.","cvssScore":8.2,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","cwes":["CWE-787"],"vendors":[],"products":[],"references":[{"url":"https://github.com/u-boot/u-boot","tags":[]},{"url":"https://github.com/u-boot/u-boot/blob/v2026.07/net/net.c#L975","tags":[]},{"url":"https://github.com/u-boot/u-boot/commit/04ca915d5bf39dda5d1bce62d04d2b59d293c5b9","tags":[]},{"url":"https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc3-out-of-bounds-write-in-ip-fragment-reassembly","tags":[]}],"exploitRefs":[{"url":"https://github.com/u-boot/u-boot","tags":[]},{"url":"https://github.com/u-boot/u-boot/blob/v2026.07/net/net.c#L975","tags":[]},{"url":"https://github.com/u-boot/u-boot/commit/04ca915d5bf39dda5d1bce62d04d2b59d293c5b9","tags":[]}],"hasPoc":true,"ai":null}