vuln-cve/data/2026/65xxx/CVE-2026-65610.json

{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-65610",
        "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
        "state": "PUBLISHED",
        "assignerShortName": "CERT-PL",
        "dateReserved": "2026-07-22T10:59:31.846Z",
        "datePublished": "2026-08-19T13:21:13.455Z",
        "dateUpdated": "2026-08-20T15:57:11.971Z"
    },
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                "orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
                "shortName": "CERT-PL",
                "dateUpdated": "2026-08-19T13:21:13.455Z"
            },
            "title": "Numeric Truncation Error in nnn",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-197",
                            "description": "CWE-197 Numeric truncation error",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-540",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-540 Overread Buffers"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "nnn",
                    "product": "nnn",
                    "repo": "https://github.com/jarun/nnn",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "5.2",
                            "versionType": "git"
                        }
                    ],
                    "defaultStatus": "unknown"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "nnn stores homelen variable as uchar_t, which can only represent values in the range 0-255. An attacker who can influence the victim's execution environment can provide an arbitrary HOME path with length that is truncated to 0. The expression (homelen - 1) is promoted to signed int and becomes -1 and producing an out-of-bounds read and an out-of-bounds write one byte before the path buffer. \n\n\n\n\nMaintainer of this project was notified about this vulnerability. It might has been addressed, but the maintainer did not provide a vulnerable version range. Only version 5.2 was tested and confirmed as vulnerable.",
                    "supportingMedia": [
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                            "value": "nnn stores homelen variable as uchar_t, which can only represent values in the range 0-255. An attacker who can influence the victim's execution environment can provide&nbsp;an arbitrary HOME path with length<span>&nbsp;that is truncated</span><span>&nbsp;to 0. T</span><span>he expression (homelen - 1) is promoted to signed int and&nbsp;</span><span>becomes -1 and producing an&nbsp;</span><span>out-of-bounds read and an out-of-bounds write one byte before the path </span><span>buffer.&nbsp;</span><div><div><br></div></div><div>Maintainer of this project was notified about this vulnerability<span>. It might has been addressed, but the maintainer did not provide a vulnerable version range. Only version 5.2 was tested and confirmed as vulnerable.</span></div>"
                        }
                    ]
                }
            ],
            "tags": [
                "x_open-source"
            ],
            "references": [
                {
                    "url": "https://cert.pl/en/posts/2026/08/CVE-2026-65609",
                    "tags": [
                        "third-party-advisory"
                    ]
                }
            ],
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                    "scenarios": [
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                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV4_0": {
                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "ACTIVE",
                        "vulnConfidentialityImpact": "LOW",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "LOW",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "LOW",
                        "subAvailabilityImpact": "NONE",
                        "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": "LOW",
                        "baseScore": 2.4,
                        "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"
                    }
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Michał Majchrowicz (AFINE Team)",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "Marcin Wyczechowski (AFINE Team)",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
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                "engine": "Vulnogram 1.0.3"
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        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-65610",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-08-20T15:32:36.475854Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-20T15:57:11.971Z"
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}