What is CVE-2026-29008?

CVE-2026-29008 is a high-severity vulnerability in U-boot, classified under Integer Underflow. CVSS score: 7.5/10. Published 2026-07-08.

How severe is CVE-2026-29008?

High severity. CVSS v3 base score is 7.5 out of 10.

Integer overflow in U-boot

CVE-2026-29008

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 mani…

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

U-boot — versions 0

Weakness classification (CWE)

CWE-191 — Integer Underflow

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-29008?: CVE-2026-29008 is a high-severity vulnerability in U-boot, classified under Integer Underflow. CVSS score: 7.5/10. Published 2026-07-08.
How severe is CVE-2026-29008?: High severity. CVSS v3 base score is 7.5 out of 10.