lwip: A vulnerability was found in lwIP up to 2.2.1
CVE-2026-8836 is fixed in 3 products on 1 platform, first by liblwip0 2.1.2+dfsg1-4ubuntu0.1~esm1, released May 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| liblwip0 · Ubuntu 20.04 LTS (focal) | 2.1.2+dfsg1-4ubuntu0.1~esm1 | liblwip0 2.1.2+dfsg1-4ubuntu0.1~esm1 | May 18, 2026 |
| liblwip0 · Ubuntu 22.04.1 LTS (jammy) | 2.1.3+dfsg1-1ubuntu0.1~esm1 | liblwip0 2.1.3+dfsg1-1ubuntu0.1~esm1 | May 18, 2026 |
| liblwip0t64 · Ubuntu 24.04.5 LTS (noble) | 2.2.0+dfsg1-6.1ubuntu0.1~esm1 | liblwip0t64 2.2.0+dfsg1-6.1ubuntu0.1~esm1 | May 18, 2026 |
| liblwip0t64 · Ubuntu 26.04.1 LTS (resolute) | 2.2.1+dfsg1-4ubuntu0.1~esm1 | liblwip0t64 2.2.1+dfsg1-4ubuntu0.1~esm1 | May 18, 2026 |
| lwip · Debian 13.5 (trixie) | 2.2.1+dfsg1-1+deb13u1 | DEBIAN-CVE-2026-8836 | May 18, 2026 |
| lwip · Debian 14 | 2.2.1+dfsg1-5 | DEBIAN-CVE-2026-8836 | May 18, 2026 |
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