CVE-2026-7423

Published: Apr 29, 2026 Last Modified: Mag 04, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,0
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Attack Vector: adjacent
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
MEDIUM 5,3
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Attack Vector: adjacent_network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0002
Percentile
0,0th
Updated

EPSS Score Trend (Last 2 Days)

191

Integer Underflow (Wrap or Wraparound)

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality Access Control
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Instability Modify Memory Execute Unauthorized Code Or Commands Bypass Protection Mechanism
Applicable Platforms
Languages: C, C#, C++, Java
View CWE Details
Application

Freertos-Plus-Tcp by Amazon

Product Information
Vendor Amazon
Product Freertos-Plus-Tcp
Version Range Affected
From 4.3.0 (inclusive)
To 4.4.1 (exclusive)
cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Freertos-Plus-Tcp by Amazon

Product Information
Vendor Amazon
Product Freertos-Plus-Tcp
Version Range Affected
From 4.0.0 (inclusive)
To 4.2.6 (exclusive)
cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://aws.amazon.com/security/security-bulletins/2026-021…
https://aws.amazon.com/security/security-bulletins/2026-021-aws/
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/…
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/…
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advi…
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-7r59-2pg…