CVE catalog

CVE-2026-7424

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and

[CVE catalog]

Severity
High · CVSS 7.2CVSS:4.0/AV:A/AC:L/AT:N/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
Published
Source
[NVD] · [CVE record]
EPSS
0.22% · Oct 25, 2026

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service (permanent IP task freeze requiring hardware reset) by sending a single crafted DHCPv6 packet. The issue is present whenever DHCPv6 is enabled. To mitigate this issue, users should upgrade to version V4.2.6 or V4.4.1 or newer.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Cpefreertos-plus-tcpNot reported4.2.6fixed
Cpefreertos-plus-tcpNot reported4.4.1fixed
Cpefreertos-plus-tcpNot reported4.4.1fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Cpefreertos-plus-tcpcpeNot reported4.2.6Not reportedNot reportedNot reported
Cpefreertos-plus-tcpcpeNot reported4.4.1Not reportedNot reportedNot reported
Cpefreertos-plus-tcpcpeNot reported4.4.1Not reportedNVD-CVE-2026-7424Not reported

OpenFactory catalog packages

No matching packages in this catalog.

Observed:

References

[FIRST EPSS] · [National Vulnerability Database (NVD)]