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CVE-2026-7426

nvd nist
Published: Apr 29, 2026Modified: May 4, 2026

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6.1
Vector
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5 (Secondary)

Description

Insufficient validation of the prefix length field in IPv6 Router Advertisement processing in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to cause memory corruption by sending a crafted Router Advertisement with a prefix length value exceeding the maximum valid length, resulting in a heap buffer overflow. Users processing IPv4 RA only are not impacted. To mitigate this issue, users should upgrade to the fixed version when available.

Affected (2)

Amazon
1 product
Freertos Plus Tcp
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Amazon
Freertos Plus Tcp
From 4.0.0 to 4.2.6
Freertos Plus Tcp
From 4.3.0 to 4.4.1

Related CWEs

CWE-787
Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.

References (4)

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Vendor Advisory
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Release Notes
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Release Notes
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Vendor AdvisoryPatch

Timeline

No history available yet.