ESF-IDF: Out-of-bounds Read in lwIP DHCP Server Option Parser

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-45160
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-10 02:16:32 UTC
Updated2026-06-10 02:16:32 UTC
DescriptionESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.7, 5.3.5, 5.4.4, 5.5.4, and 6.0.1, an out-of-bounds read flaw exists in the DHCP server option parser (parse_options() in components/lwip/apps/dhcpserver/dhcpserver.c) shipped with ESP-IDF's lwIP component. The parser walks the BOOTP/DHCP options field without validating that each option's length byte and declared payload length stay within the received packet buffer. A crafted DHCP request can cause the parser to read past the end of the options buffer into adjacent heap memory. The issue affects the DHCP server used by ESP-IDF's SoftAP and any configuration where the device runs as a DHCP server on a local network. This issue has been patched in versions 5.2.8, 5.3.6, 5.4.5, 5.5.5, and 6.0.2.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-125 | CWE-125 CWE-125: Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Espressif Esp-idf affected = 5.2.7 Not specified
CNA Espressif Esp-idf affected = 5.3.5 Not specified
CNA Espressif Esp-idf affected = 5.4.4 Not specified
CNA Espressif Esp-idf affected = 5.5.4 Not specified
CNA Espressif Esp-idf affected = 6.0.1 Not specified

References

ReferenceSourceLinkTags
github.com/espressif/esp-idf/commit/8b4b5d5301815198d177974ffc24848f4774... [email protected] github.com
github.com/espressif/esp-idf/commit/fba5f995436a3e3139f768b6d8f1a74d5ce1... [email protected] github.com
github.com/espressif/esp-idf/security/advisories/GHSA-g764-gwc3-75m5 [email protected] github.com
github.com/espressif/esp-idf/commit/2da2db43fd7e0bcff9e7b95f54f388296bb6... [email protected] github.com
github.com/espressif/esp-idf/commit/9f713dbc94982d917f2d12964b233cd9efa4... [email protected] github.com
github.com/espressif/esp-idf/commit/2bf4dd12002dbae60a4b21abff010ecb2b8e... [email protected] github.com
github.com/espressif/esp-idf/commit/d51b1076092487e533eadf8b48c9c8579d3a... [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report