CVE-2026-7425: CWE-125: Out-of-bounds Read in AWS FreeRTOS-Plus-TCP
CVE-2026-7425 is an out-of-bounds read vulnerability in the IPv6 Router Advertisement parser of AWS FreeRTOS-Plus-TCP versions prior to 4.2.6 and 4.4.1. An attacker on an adjacent network can send a specially crafted Router Advertisement with a truncated PREFIX_INFORMATION option, causing the device to crash and resulting in a denial of service. The vulnerability has a medium severity with a CVSS score of 6.5. AWS manages this vulnerability as a cloud service and has released fixed versions to address the issue. Users should upgrade to the patched versions when available.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-7425) involves an out-of-bounds read (CWE-125) in the IPv6 Router Advertisement parser component of AWS FreeRTOS-Plus-TCP. Specifically, the flaw occurs when processing a truncated PREFIX_INFORMATION option in Router Advertisements, which can cause the device to crash, leading to denial of service. It affects versions before 4.2.6 and 4.4.1. AWS provides this as a cloud service and has issued patches to remediate the issue.
Potential Impact
An adjacent network attacker can exploit this vulnerability by sending a crafted IPv6 Router Advertisement packet with a truncated PREFIX_INFORMATION option. This triggers an out-of-bounds read in the parser, causing the device to crash and resulting in denial of service. There is no impact on confidentiality or integrity reported. No known exploits are currently in the wild.
Mitigation Recommendations
AWS manages remediation for this cloud-hosted service and has released fixed versions 4.2.6 and 4.4.1 of FreeRTOS-Plus-TCP that address this vulnerability. Users are advised to upgrade to these patched versions once available. Check the AWS security advisory at https://aws.amazon.com/security/security-bulletins/2026-023-aws/ for the latest remediation guidance.
CVE-2026-7425: CWE-125: Out-of-bounds Read in AWS FreeRTOS-Plus-TCP
Description
CVE-2026-7425 is an out-of-bounds read vulnerability in the IPv6 Router Advertisement parser of AWS FreeRTOS-Plus-TCP versions prior to 4.2.6 and 4.4.1. An attacker on an adjacent network can send a specially crafted Router Advertisement with a truncated PREFIX_INFORMATION option, causing the device to crash and resulting in a denial of service. The vulnerability has a medium severity with a CVSS score of 6.5. AWS manages this vulnerability as a cloud service and has released fixed versions to address the issue. Users should upgrade to the patched versions when available.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-7425) involves an out-of-bounds read (CWE-125) in the IPv6 Router Advertisement parser component of AWS FreeRTOS-Plus-TCP. Specifically, the flaw occurs when processing a truncated PREFIX_INFORMATION option in Router Advertisements, which can cause the device to crash, leading to denial of service. It affects versions before 4.2.6 and 4.4.1. AWS provides this as a cloud service and has issued patches to remediate the issue.
Potential Impact
An adjacent network attacker can exploit this vulnerability by sending a crafted IPv6 Router Advertisement packet with a truncated PREFIX_INFORMATION option. This triggers an out-of-bounds read in the parser, causing the device to crash and resulting in denial of service. There is no impact on confidentiality or integrity reported. No known exploits are currently in the wild.
Mitigation Recommendations
AWS manages remediation for this cloud-hosted service and has released fixed versions 4.2.6 and 4.4.1 of FreeRTOS-Plus-TCP that address this vulnerability. Users are advised to upgrade to these patched versions once available. Check the AWS security advisory at https://aws.amazon.com/security/security-bulletins/2026-023-aws/ for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- AMZN
- Date Reserved
- 2026-04-29T14:27:51.904Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://aws.amazon.com/security/security-bulletins/2026-023-aws/","vendor":"AWS"}]
Threat ID: 69f25db7cbff5d861043482f
Added to database: 4/29/2026, 7:36:23 PM
Last enriched: 6/5/2026, 7:30:24 PM
Last updated: 6/13/2026, 8:53:19 PM
Views: 80
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