Summary
It was discovered that lwIP contained a buffer overflow in the EAP
authentication handling code. An attacker could possibly use this issue
to trigger a buffer overflow, resulting in arbitrary code execution or a
denial of service. This issue only affected Ubuntu 20.04 LTS.
(CVE-2020-8597)
It was discovered that lwIP incorrectly handled certain ICMPv6 or
6LoWPAN packets. An attacker could possibly use this issue to trigger a
buffer overflow, resulting in information disclosure. This issue only
affected Ubuntu 20.04 LTS. (CVE-2020-22283, CVE-2020-22284)
It was discovered that lwIP did not properly validate certain SNMPv3
authentication parameters. An attacker could possibly use this issue to
trigger a stack-based buffer overflow, resulting in arbitrary code
execution or a denial of service. (CVE-2026-8836)
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | lwip | 2.1.2+dfsg1-4ubuntu0.1~esm1 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | lwip | 2.1.3+dfsg1-1ubuntu0.1~esm1 |
| Ubuntu · Pro 24.04 LTS Pro:24.04:LTS | lwip | 2.2.0+dfsg1-6.1ubuntu0.1~esm1 |
| Ubuntu · Pro 26.04 LTS Pro:26.04:LTS | lwip | 2.2.1+dfsg1-4ubuntu0.1~esm1 |