U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6_parse_options() that fails to validate SERVERID and CLIENTID option lengths… (CVE-2026-74225)
U-Boot versions prior to 2026.10-rc5 contain an out-of-bounds memory access vulnerability in the dhcp6_parse_options() function. This flaw arises from improper validation of SERVERID and CLIENTID option lengths in DHCPv6 packets. An attacker on the local network can exploit this by sending crafted DHCPv6 ADVERTISE or REPLY packets during netboot, potentially causing memory corruption and crashing the bootloader.
AI Analysis
Technical Summary
The vulnerability in U-Boot before version 2026.10-rc5 is due to a failure to validate the lengths of SERVERID and CLIENTID options in DHCPv6 packets within the dhcp6_parse_options() function. This leads to out-of-bounds memory access, which can be triggered by an attacker on the local network sending malicious DHCPv6 ADVERTISE or REPLY packets during the netboot process. The result is memory corruption that can crash the bootloader, impacting system availability.
Potential Impact
Exploitation of this vulnerability can cause the U-Boot bootloader to crash due to memory corruption. This affects system availability during the boot process but does not impact confidentiality or integrity directly according to the CVSS vector. The attack requires local network access and no privileges or user interaction are needed.
Mitigation Recommendations
A fix is available in U-Boot version 2026.10-rc5 and later. Users should upgrade to this version or a later release to remediate the vulnerability. No additional mitigation steps are indicated in the provided data.
U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6_parse_options() that fails to validate SERVERID and CLIENTID option lengths… (CVE-2026-74225)
Description
U-Boot versions prior to 2026.10-rc5 contain an out-of-bounds memory access vulnerability in the dhcp6_parse_options() function. This flaw arises from improper validation of SERVERID and CLIENTID option lengths in DHCPv6 packets. An attacker on the local network can exploit this by sending crafted DHCPv6 ADVERTISE or REPLY packets during netboot, potentially causing memory corruption and crashing the bootloader.
CVSS v3.1
Score 7.1high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in U-Boot before version 2026.10-rc5 is due to a failure to validate the lengths of SERVERID and CLIENTID options in DHCPv6 packets within the dhcp6_parse_options() function. This leads to out-of-bounds memory access, which can be triggered by an attacker on the local network sending malicious DHCPv6 ADVERTISE or REPLY packets during the netboot process. The result is memory corruption that can crash the bootloader, impacting system availability.
Potential Impact
Exploitation of this vulnerability can cause the U-Boot bootloader to crash due to memory corruption. This affects system availability during the boot process but does not impact confidentiality or integrity directly according to the CVSS vector. The attack requires local network access and no privileges or user interaction are needed.
Mitigation Recommendations
A fix is available in U-Boot version 2026.10-rc5 and later. Users should upgrade to this version or a later release to remediate the vulnerability. No additional mitigation steps are indicated in the provided data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-c478-wgg8-3gvq
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-74225"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6abc5d46680226ef6899ba72
Added to database: 09/30/2026, 00:52:22 UTC
Last enriched: 09/30/2026, 01:06:19 UTC
Last updated: 09/30/2026, 01:27:28 UTC
Views: 3
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