Out-of-bounds Write Affecting lwip package, versions <2.2.1+dfsg1-8
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-LWIP-20067648
- published24 Sept 2026
- disclosed22 Sept 2026
Introduced: 22 Sep 2026
NewCVE-2026-87121 (opens in a new tab)How to fix?
Upgrade Debian:unstable lwip to version 2.2.1+dfsg1-8 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream lwip package and not the lwip package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
lwIP TCP/IP Stack MQTT is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device.