CVE-2026-7422Insufficient packet validation in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to bypass all checksum and minimum-size validation by spoofing the Ethernet source MAC ad…
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It affects amazon freertos-plus-tcp. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Insufficient packet validation in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to bypass all checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the device's own registered endpoints, because the loopback detection mechanism skips all input validation for packets whose source MAC matches a local endpoint. To mitigate this issue, users should upgrade to the fixed version when available.
- CVSS
- 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-290
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
amazon freertos-plus-tcp amazon:freertos-plus-tcp | from 4.0.0 before 4.2.6; from 4.3.0 before 4.4.1 | NVD |
References
- https://aws.amazon.com/security/security-bulletins/2026-021-aws/vendor-advisory
- https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6release-notes
- https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1release-notes
- https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-jpw4-6h59-62w9patch, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.