Categories
CVE-2026-7423

Integer Underflow in ICMP Echo Reply Processing in FreeRTOS-Plus-TCP

Summary

Integer Underflow in ICMP Echo Reply Processing in FreeRTOS-Plus-TCP

Original description

The description as published by the source.

Integer underflow in the ICMP and ICMPv6 echo reply handlers in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network user to cause a denial of service (device crash) when outgoing ping support is enabled, because header sizes are subtracted from a packet length field without validating the field is large enough, resulting in a heap out-of-bounds read of up to approximately 65KB.

To mitigate this issue, users should upgrade to the fixed version when available.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

References

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