Integer Underflow (Wrap or Wraparound) Affecting FreeRTOS/FreeRTOS-Plus-TCP package, versions [,4.2.6)[4.3.0,4.4.1)
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-UNMANAGED-FREERTOSFREERTOSPLUSTCP-16323057
- published30 Apr 2026
- disclosed29 Apr 2026
- creditUnknown
Introduced: 29 Apr 2026
NewCVE-2026-7423 (opens in a new tab)How to fix?
Upgrade FreeRTOS/FreeRTOS-Plus-TCP to version 4.2.6, 4.4.1 or higher.
Overview
Affected versions of this package are vulnerable to Integer Underflow (Wrap or Wraparound) via the ICMP and ICMPv6 echo reply handlers. An attacker can trigger a device crash by sending specially crafted network packets that exploit improper validation of packet length fields, leading to a heap out-of-bounds read.