{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-40553",
        "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
        "state": "PUBLISHED",
        "assignerShortName": "CERT-PL",
        "dateReserved": "2026-04-14T09:44:32.553Z",
        "datePublished": "2026-07-13T12:07:56.611Z",
        "dateUpdated": "2026-07-13T13:00:45.449Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
                "shortName": "CERT-PL",
                "dateUpdated": "2026-07-13T12:11:30.685Z"
            },
            "title": "Stack-based buffer overflow in gawk",
            "datePublic": "2026-07-13T12:07:00.000Z",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-121",
                            "description": "CWE-121 Stack-based Buffer Overflow",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "GNU",
                    "product": "gawk",
                    "repo": "https://cgit.git.savannah.gnu.org/cgit/gawk.git/",
                    "programFiles": [
                        "readdir.c"
                    ],
                    "programRoutines": [
                        {
                            "name": "ftype()"
                        }
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "5.4.0",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Buffer overflow vulnerability has been found in \"extension/readdir.c\" program file of gawk (ftype() routine). This issue could be used to crash the program and potentially to achieve code execution, although the latter has not been confirmed to be feasible. It affects gawk in versions 5.4.0 and below.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "Buffer overflow vulnerability has been found in \"<span><span>extension/readdir.c</span></span>\" program file of gawk (ftype()&nbsp;<span>routine)</span>. <span>This issue could be used to crash the program and potentially to achieve code execution, although the latter has not been confirmed to be feasible. </span><span>It affects</span>&nbsp;gawk in versions 5.4.0 and below.<br><br>"
                        }
                    ]
                }
            ],
            "tags": [
                "x_open-source"
            ],
            "references": [
                {
                    "url": "https://cgit.git.savannah.gnu.org/cgit/gawk.git/commit/?id=cca0366144336b49aaa7d5d949966ce8e2c70843",
                    "tags": [
                        "patch"
                    ]
                },
                {
                    "url": "https://cert.pl/en/posts/2026/07/CVE-2026-40467",
                    "tags": [
                        "third-party-advisory"
                    ]
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV4_0": {
                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "subConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "LOW",
                        "subIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "LOW",
                        "subAvailabilityImpact": "LOW",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 5.1,
                        "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L"
                    }
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Michał Majchrowicz (AFINE)",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "Marcin Wyczechowski (AFINE)",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "x_generator": {
                "engine": "Vulnogram 0.2.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-13T13:00:40.324542Z",
                                "id": "CVE-2026-40553",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-13T13:00:45.449Z"
                }
            }
        ]
    }
}