Is CVE-2026-7422 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-7422 being exploited in the wild.

How severe is CVE-2026-7422?

High severity, with a CVSS score of 6.5, published 29 April 2026.

Which products and versions are affected?

Amazon Web Services FreeRTOS-Plus-TCP >=V4.0.0, =V4.3.0, <=V4.4.0.

Is there a fix for CVE-2026-7422?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-7422 attacked?

It is attacked from the adjacent network, in a software library.

Am I affected by CVE-2026-7422?

Check whether you run Amazon AWS, Amazon Freertos-Plus-Tcp or Amazon Web Services FreeRTOS-Plus-TCP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-7422: Amazon FreeRTOS-Plus-TCP multiple vulnerabilities in ICMP and packet validation

Q: Is there a fix for CVE-2026-7422?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Q: How is CVE-2026-7422 attacked?

It is attacked from the adjacent network, in a software library.

Q: Am I affected by CVE-2026-7422?

Check whether you run Amazon AWS, Amazon Freertos-Plus-Tcp or Amazon Web Services FreeRTOS-Plus-TCP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-7422 · Severity: high · CVSS 6.5 · Published 2026-04-29

FreeRTOS-Plus-TCP is a networking library used by embedded devices to communicate over the internet or local networks. Two vulnerabilities have been identified that allow nearby attackers on the same network to bypass security checks or crash the device. An exploit could lead to a complete service outage for the affected hardware, potentially disrupting industrial or IoT operations.

Technologies: Amazon AWS, Amazon Freertos-Plus-Tcp, Amazon Web Services FreeRTOS-Plus-TCP. Vendors: Amazon, Amazon Web Services.

Quick answers

Is CVE-2026-7422 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-7422 being exploited in the wild.
How severe is CVE-2026-7422?: High severity, with a CVSS score of 6.5, published 29 April 2026.
Which products and versions are affected?: Amazon Web Services FreeRTOS-Plus-TCP >=V4.0.0, <=V4.2.5; >=V4.3.0, <=V4.4.0.
Is there a fix for CVE-2026-7422?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-7422 attacked?: It is attacked from the adjacent network, in a software library.
Am I affected by CVE-2026-7422?: Check whether you run Amazon AWS, Amazon Freertos-Plus-Tcp or Amazon Web Services FreeRTOS-Plus-TCP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

Two vulnerabilities exist in the FreeRTOS-Plus-TCP stack. CVE-2026-7422 involves insufficient packet validation in IPv4/IPv6 receive paths; an adjacent attacker can bypass checksum and minimum-size validations by spoofing the Ethernet source MAC address to match the target's own endpoint. CVE-2026-7423 is an integer underflow in the ICMP/ICMPv6 echo reply handlers occurring when outgoing ping support is enabled. This underflow happens when header sizes are subtracted from a packet length field without bounds checking, resulting in a heap out-of-bounds read and a device crash. These issues are fixed in versions V4.4.1 and V4.2.6.

Affected products

Amazon Web Services FreeRTOS-Plus-TCP >=V4.0.0, <=V4.2.5; >=V4.3.0, <=V4.4.0

Identifiers

CVE-2026-7422
CVE-2026-7423

Timeline

2026-04-29: disclosed
2026-04-29: advisory

References

https://aws.amazon.com/security/security-bulletins/rss/2026-021-aws/

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