CVE-2026-8836

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Source
https://cve.org/CVERecord?id=CVE-2026-8836
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-8836.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-8836
Downstream
Published
2026-05-18T18:45:12.791Z
Modified
2026-08-02T08:13:11.556130Z
Severity
  • 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X CVSS Calculator
Summary
lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow
Details

A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmpparseinboundframe of the file src/apps/snmp/snmpmsg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue.

Database specific 
{
    "cna_assigner": "VulDB",
    "cwe_ids": [
        "CWE-119",
        "CWE-121"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8836.json"
}
References

Affected packages

Git / cgit.git.savannah.gnu.org/cgit/lwip.git

Affected ranges

Type
GIT
Repo
https://cgit.git.savannah.gnu.org/cgit/lwip.git
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0c957ec03054eb6c8205e9c9d1d05d90ada3898c
Database specific 
{
    "source": "REFERENCES"
}
Type
GIT
Repo
https://github.com/lwip-tcpip/lwip
Events
Introduced
e6a8415df332ee34d7af02255b2aa1e8ee74348f
Fixed
0c957ec03054eb6c8205e9c9d1d05d90ada3898c
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "2.1.0"
        },
        {
            "last_affected": "2.1.0"
        },
        {
            "introduced": "2.1.1"
        },
        {
            "last_affected": "2.1.1"
        },
        {
            "introduced": "2.1.2"
        },
        {
            "last_affected": "2.1.2"
        },
        {
            "introduced": "2.1.3"
        },
        {
            "last_affected": "2.1.3"
        },
        {
            "introduced": "2.2.0"
        },
        {
            "last_affected": "2.2.0"
        },
        {
            "introduced": "2.2.1"
        },
        {
            "last_affected": "2.2.1"
        }
    ]
}

Affected versions

2.*
2.1.0
2.1.1
2.1.2
2.1.3
2.2.0
2.2.1
Other
STABLE-2_1_0_RELEASE
STABLE-2_2_0_RC1
STABLE-2_2_0_RELEASE
STABLE-2_2_1_RELEASE

Database specific

vanir_signatures 
[
    {
        "target": {
            "function": "snmp_parse_inbound_frame",
            "file": "src/apps/snmp/snmp_msg.c"
        },
        "signature_version": "v1",
        "digest": {
            "function_hash": "19959618142971779333011119396170681332",
            "length": 13733.0
        },
        "deprecated": false,
        "id": "CVE-2026-8836-4e43fed8",
        "source": "https://github.com/lwip-tcpip/lwip/commit/0c957ec03054eb6c8205e9c9d1d05d90ada3898c",
        "signature_type": "Function"
    },
    {
        "target": {
            "file": "src/apps/snmp/snmp_msg.c"
        },
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "245867555644983852973312368904293827338",
                "28492208928645668440716763985711222686",
                "318717264420566938746344996407567378298",
                "260892538432625647989747907937262962767",
                "296728773310018861088045191571540210334"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "id": "CVE-2026-8836-a82d9028",
        "source": "https://github.com/lwip-tcpip/lwip/commit/0c957ec03054eb6c8205e9c9d1d05d90ada3898c",
        "signature_type": "Line"
    }
]
source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-8836.json"
vanir_signatures_modified 
"2026-08-02T08:13:11Z"