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CVE-2026-7425

Out-of-Bounds Read in Router Advertisement Option Parser in FreeRTOS-Plus-TCP

MEDIUM
6.5
CVSS Score
Published: April 29, 2026 at 06:52 PM UTC
Updated: October 26, 2026 at 08:10 PM UTC
3 products affected across 3 vendorsFreertos Plus TCPFreeRTOS-Plus-TCPFreeRTOS-Plus-TCP

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

Insufficient option length validation in the IPv6 Router Advertisement parser in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to cause a denial of service (device crash) by sending a crafted Router Advertisement with a truncated PREFIX_INFORMATION option that is smaller than the expected structure size. To mitigate this issue, users should upgrade to the fixed version when available.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Freertos Plus TCP· Amazon
95%
4.0.0 ≤ v < 4.2.64.3.0 ≤ v < 4.4.1
Affected range stops below 4.2.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.1, so it looks safe — our inference, not a vendor statement
FreeRTOS-Plus-TCP· AWS
90%
4.0.0 ≤ v < 4.2.64.3.0 ≤ v < 4.4.14.0.04.3.0
Vendor states this is fixed in 4.2.6 (unaffected)
Vendor states this is fixed in 4.4.1 (unaffected)
FreeRTOS-Plus-TCP· Freertos
85%
All versions

References (4)

PatchRelease Notes
Source: cverecord
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1
PatchRelease Notes
Source: cverecord
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6
Vendor Advisory
Source: cverecord
https://aws.amazon.com/security/security-bulletins/2026-023-aws/
Third Party AdvisoryPatchVendor Advisory
Source: cverecord
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-gffr-xgjg-jh9j

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMAMZN
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-125

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