5.3 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 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.
https://nvd.nist.gov/vuln/detail/CVE-2026-7423
Categories
CWE-191 : Integer Underflow (Wrap or Wraparound)
This can happen in signed and unsigned cases.
References
ff89ba41-3aa1-4d27-914a-91399e9639e5 Patch
AFFECTED (from MITRE)
| Vendor |
Product |
Versions |
| AWS |
FreeRTOS-Plus-TCP |
- 4.0.0 < 4.2.6 [affected]
- 4.3.0 < 4.4.1 [affected]
- 4.2.6 [unaffected]
- 4.4.1 [unaffected]
|
| © 2022 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. |
CPE
| cpe |
start |
end |
| Configuration 1 |
| cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:* |
>= 4.0.0 |
< 4.2.6 |
| cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:* |
>= 4.3.0 |
< 4.4.1 |
REMEDIATION
Patch
EXPLOITS
Exploit-db.com
| id |
description |
date |
|
| No known exploits |
POC Github
Other Nist (github, ...)
CAPEC
Common Attack Pattern Enumerations and Classifications
| id |
description |
severity |
| No entry |
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