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CVE-2026-7423

6.0 medium SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 2

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 6.0 · amazonNVD modified 2026-10-26 20:10

Affected (CPE criteria) 1

  • cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:*

References 4