CVE-2026-8836: lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow
A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmpparseinboundframe of the file src/apps/snmp/snmpmsg.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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/lwipto a version that resolves this vulnerability.Fixed in 2.2.1+dfsg1-5 - Upgrade
Upgrade
lwIPto a version that resolves this vulnerability.Fixed in 2.2.1Patch 0c957ec03054eb6c8205e9c9d1d05d90ada3898c
Event History
Frequently Asked Questions
What is the severity of CVE-2026-8836?
The severity of CVE-2026-8836 is classified as high due to the potential for stack-based overflow and remote code execution.
How do I fix CVE-2026-8836?
To fix CVE-2026-8836, you should update lwIP to version 2.2.2 or later, where the vulnerability has been addressed.
What systems are affected by CVE-2026-8836?
CVE-2026-8836 affects all versions of lwIP up to and including 2.2.1, specifically impacting the snmp_parse_inbound_frame function.
What kind of attack is possible with CVE-2026-8836?
CVE-2026-8836 can be exploited using a crafted SNMP message to cause a stack-based buffer overflow, potentially leading to arbitrary code execution.
Where can I find more information about CVE-2026-8836?
You can find more information about CVE-2026-8836 in security advisories and forums dedicated to lwIP vulnerabilities.