CVE-2025-11936

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Source

https://cve.org/CVERecord?id=CVE-2025-11936

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-11936.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2025-11936

Downstream

Published

2025-11-21T22:24:27Z

Modified

2026-10-24T02:30:46Z

Severity

6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L CVSS Calculator

Summary

Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 ClientHello

Details

Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to excessive CPU and memory consumption during ClientHello processing.

Database specific

{
    "cna_assigner":  "wolfSSL",
    "cwe_ids":  [
        "CWE-20"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/11xxx/CVE-2025-11936.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "introduced":  "3.12.0"
                        },
                        {
                            "fixed":  "5.8.4"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StandardRange"
                }
            ]
        }
    ]
}

References

Affected packages

Git / github.com/wolfssl/wolfssl

Affected ranges

Type

GIT

Repo

https://github.com/wolfssl/wolfssl

Events

Introduced

decea12e223869c8f8f3ab5a53dc90b69f436eb2

Fixed

59f4fa568615396fbf381b073b220d1e8d61e4c2

Database specific

Show details

{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "5.8.2"
                },
                {
                    "fixed":  "5.8.4"
                }
            ],
            "source":  "CPE_RANGE"
        }
    ]
}

Affected versions

v5.*

v5.8.2-stable

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-11936.json"