CVE-2026-7423

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Source
https://cve.org/CVERecord?id=CVE-2026-7423
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-7423.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-7423
Aliases
  • GHSA-7r59-2pgv-9v2r
Published
2026-04-29T18:36:28.353Z
Modified
2026-07-15T01:48:51.705553810Z
Severity
  • 6.0 (Medium) CVSS_V4 - CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Integer Underflow in ICMP Echo Reply Processing in FreeRTOS-Plus-TCP
Details

Integer underflow in the ICMP and ICMPv6 echo reply handlers in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network user to cause a denial of service (device crash) when outgoing ping support is enabled, because header sizes are subtracted from a packet length field without validating the field is large enough, resulting in a heap out-of-bounds read of up to approximately 65KB.

To mitigate this issue, users should upgrade to the fixed version when available.

Database specific 
{
    "cwe_ids": [
        "CWE-191"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7423.json",
    "cna_assigner": "AMZN"
}
References

Affected packages

Git / github.com/freertos/freertos-plus-tcp

Affected ranges

Type
GIT
Repo
https://github.com/freertos/freertos-plus-tcp
Events
Introduced
3e26a338bd1547bbaa6f4965def1a4b152620d3e
Fixed
5986530664073a609e634bde63dd9bff37e725f0
Introduced
dd4d689acc04015e5a2a3ef2cebb6725f55c60be
Fixed
c12361095aca68aeed858f45d14395fbffa92c0d
Database specific 
{
    "cpe": "cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "4.0.0"
        },
        {
            "fixed": "4.2.6"
        },
        {
            "introduced": "4.3.0"
        },
        {
            "fixed": "4.4.1"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

V4.*
V4.0.0-appsec
V4.2.0
V4.2.1
V4.2.2
V4.2.3
V4.2.4
V4.2.5
V4.4.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-7423.json"