CVE-2026-8836 Details
Description
A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.
A stack-based buffer overflow vulnerability has been identified in lwIP versions prior to 2.2.1. The issue arises in the SNMPv3 USM Handler, specifically within the snmp_parse_inbound_frame function of the snmp_msg.c file. The vulnerability can be exploited remotely by manipulating the msgAuthenticationParameters argument, leading to a buffer overflow on the stack.
Users are advised to update to lwIP version 2.2.1 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 18, 2026CISA-ADP
Assessed May 18, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=0c957ec03054eb6c8205e9c9d1d05d90ada3898c | [email protected] | Source CodeVendor |
| https://github.com/lwip-tcpip/lwip/commit/0c957ec03054eb6c8205e9c9d1d05d90ada3898c | [email protected] | Source CodeVendor |
| https://savannah.nongnu.org/bugs/?68055 | [email protected] | |
| https://savannah.nongnu.org/bugs/?68194 | [email protected] | Issue TrackingPermission RequiredVendor |
| https://vuldb.com/cve/CVE-2026-8836 | [email protected] | |
| https://vuldb.com/submit/829798 | [email protected] | Permission Required |
| https://vuldb.com/vuln/364474 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/364474/cti | [email protected] | AdvisoryPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| lwIP | <= 2.2.1 (semver) |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 22, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 18, 2026 | New CVE Received | [email protected] |