CVE-2026-74225 U-Boot - Denial of Service

U-Boot before 2026.10-rc5 contains an out-of-bounds memory access caused by improper validation of SERVERID and CLIENTID option lengths in DHCPv6 packets, letting local network attackers corrupt memory and crash the bootloader during netboot.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.23% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Update to version 2026.10-rc5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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