5.3
Medium
CVE-2026-7423 Integer underflow in the ICMP and ICMPv6 echo reply handlers in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an…
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| FreeRTOS-Plus-TCP 4.4 | earliest → < 4.4.1 | 4.4.1 |
| FreeRTOS-Plus-TCP 4.3 | 4.3.0 → < 4.4.1 | 4.4.1 |
| FreeRTOS-Plus-TCP 4.2 | earliest → < 4.2.6 | 4.2.6 |
| FreeRTOS-Plus-TCP 4.0 | 4.0.0 → < 4.2.6 | 4.2.6 |
References
- github.com github.com
- github.com github.com
- aws.amazon.com aws.amazon.com
- github.com github.com
Timeline
- Published
- Last modified
Other CVEs of FreeRTOS-Plus-TCP
The 7 CVEs of FreeRTOS-Plus-TCP →
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CVE-2026-7422
Insufficient packet validation in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to…
6.5
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