{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-2903",
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "state": "PUBLISHED",
        "assignerShortName": "VulDB",
        "dateReserved": "2026-02-20T20:02:38.891Z",
        "datePublished": "2026-02-22T00:32:09.412Z",
        "dateUpdated": "2026-06-23T15:50:16.004Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
                "shortName": "VulDB",
                "dateUpdated": "2026-02-22T00:32:09.412Z"
            },
            "title": "skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "cweId": "CWE-476",
                            "lang": "en",
                            "description": "NULL Pointer Dereference"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "cweId": "CWE-404",
                            "lang": "en",
                            "description": "Denial of Service"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "skvadrik",
                    "product": "re2c",
                    "versions": [
                        {
                            "version": "4.0",
                            "status": "affected"
                        },
                        {
                            "version": "4.1",
                            "status": "affected"
                        },
                        {
                            "version": "4.2",
                            "status": "affected"
                        },
                        {
                            "version": "4.3",
                            "status": "affected"
                        },
                        {
                            "version": "4.4",
                            "status": "affected"
                        }
                    ],
                    "cpes": [
                        "cpe:2.3:a:re2c:re2c:*:*:*:*:*:*:*:*"
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A flaw has been found in skvadrik re2c up to 4.4. Impacted is the function check_and_merge_special_rules of the file src/parse/ast.cc. This manipulation causes null pointer dereference. The attack can only be executed locally. The exploit has been published and may be used. Patch name: febeb977936f9519a25d9fbd10ff8256358cdb97. It is suggested to install a patch to address this issue."
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "version": "4.0",
                        "baseScore": 4.8,
                        "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
                        "baseSeverity": "MEDIUM"
                    }
                },
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "baseScore": 3.3,
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C",
                        "baseSeverity": "LOW"
                    }
                },
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                    "cvssV3_0": {
                        "version": "3.0",
                        "baseScore": 3.3,
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                        "baseSeverity": "LOW"
                    }
                },
                {
                    "cvssV2_0": {
                        "version": "2.0",
                        "baseScore": 1.7,
                        "vectorString": "AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C"
                    }
                }
            ],
            "timeline": [
                {
                    "time": "2026-02-20T00:00:00.000Z",
                    "lang": "en",
                    "value": "Advisory disclosed"
                },
                {
                    "time": "2026-02-20T01:00:00.000Z",
                    "lang": "en",
                    "value": "VulDB entry created"
                },
                {
                    "time": "2026-02-20T21:07:45.000Z",
                    "lang": "en",
                    "value": "VulDB entry last update"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Oneafter (VulDB User)",
                    "type": "reporter"
                }
            ],
            "references": [
                {
                    "url": "https://vuldb.com/?id.347210",
                    "name": "VDB-347210 | skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference",
                    "tags": [
                        "vdb-entry",
                        "technical-description"
                    ]
                },
                {
                    "url": "https://vuldb.com/?ctiid.347210",
                    "name": "VDB-347210 | CTI Indicators (IOB, IOC, IOA)",
                    "tags": [
                        "signature",
                        "permissions-required"
                    ]
                },
                {
                    "url": "https://vuldb.com/?submit.755030",
                    "name": "Submit #755030 | skvadrik re2c  04f1424 NULL Pointer Dereference",
                    "tags": [
                        "third-party-advisory"
                    ]
                },
                {
                    "url": "https://github.com/skvadrik/re2c/issues/571",
                    "tags": [
                        "issue-tracking"
                    ]
                },
                {
                    "url": "https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101",
                    "tags": [
                        "issue-tracking"
                    ]
                },
                {
                    "url": "https://github.com/oneafter/0202/blob/main/re/repro",
                    "tags": [
                        "exploit"
                    ]
                },
                {
                    "url": "https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97",
                    "tags": [
                        "patch"
                    ]
                },
                {
                    "url": "https://github.com/skvadrik/re2c/",
                    "tags": [
                        "product"
                    ]
                }
            ],
            "tags": [
                "x_open-source"
            ]
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-02-26T16:21:03.435710Z",
                                "id": "CVE-2026-2903",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "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": "2026-06-23T15:50:16.004Z"
                }
            }
        ]
    }
}