{"id":"CVE-2026-90484","revision":null,"records":[{"revision":"c8086cc4fef440f9b1ac496c45a0e91a","observedAt":"2026-10-26T15:35:30.984+00:00","statement":{"source":"cve-program","id":"CVE-2026-90484","aliases":[],"title":"Apache bRPC: Null pointer dereference in MySQL reply parser leading to client crash","description":"The MySQL client response parser in Apache bRPC dereferences a null pointer when the server peer sends a zero-payload-length response packet. A response packet whose declared payload length is zero is accepted by the frame-length check (is_full_package), after which the parser reads the response type byte via an unbounded 5-byte fetch that returns nullptr, and type = p[4] dereferences it, crashing the client process.\n\n\n\nRoot Cause: In brpc::policy::MysqlReply::ConsumePartialIOBuf, buf.fetch(header, 5) returns nullptr when the buffered data only holds the 4-byte header of a zero-length packet, then the code reads p[4] (and, in the fast-auth path, p2[4]) without checking for a null or zero-length packet.\n\n\n\nAffected Scenarios: A brpc MySQL client connecting to a malicious or compromised MySQL server (or a MITM) can be crashed by a zero-length server response packet, resulting in denial of service of the client.\n\n\n\nFix: The fix rejects zero-length response packets (returning PARSE_ERROR_ABSOLUTELY_WRONG) both for the initial response type determination and after a fast-auth marker, before reading the type byte. Upgrade to the Apache bRPC version 1.18.0 or apply the PR patch at https://github.com/apache/brpc/pull/3536.","state":0,"publishedAt":"2026-10-21T12:19:37.796+00:00","modifiedAt":"2026-10-26T13:39:12.101+00:00","affected":[{"ecosystem":"https://github.com","name":"apache/brpc","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Apache Software Foundation\",\n                    \"product\": \"Apache bRPC\",\n                    \"packageURL\": \"pkg:github/apache/brpc\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"<= 1.11.0\",\n                            \"lessThan\": \"1.18.0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"collectionURL\": \"https://github.com\",\n                    \"packageName\": \"apache/brpc\"\n                }"}],"metrics":[],"references":["https://github.com/apache/brpc/pull/3536","https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90484","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90484","identifiers":["CVE-2026-90484"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-27T16:45:49.1917550+00:00","complete":true,"records":1758,"lastAttemptAt":"2026-10-27T16:45:49.191755+00:00","lastSuccessAt":"2026-10-27T16:45:49.3612251+00:00","error":null,"lastVerifiedAt":"2026-10-27T16:45:49.3612272+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-187d2b72c94ceb8c4417f1032ec3109a3a3a7b730abadb561d8cdd2a96e04d27-9922a1af2a457f8fe41f33587e7889e1da7ec81456fc303a945443c06d359ab2","complete":true,"records":415241,"lastAttemptAt":"2026-10-27T16:43:56.5794832+00:00","lastSuccessAt":"2026-10-27T16:43:56.5022811+00:00","error":null,"lastVerifiedAt":"2026-10-27T16:43:56.5794832+00:00","snapshotPublishedAt":"2026-10-27T16:35:35+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-43321610382942b8ad8c85917eab1546","complete":false,"records":4735,"lastAttemptAt":"2026-10-27T16:46:16.6955146+00:00","lastSuccessAt":"2026-10-24T23:18:49.862+00:00","error":"InvalidDataException","lastVerifiedAt":"2026-10-24T23:18:49.862+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":0,"expectedIdentifiers":13497},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-27T16:45:49.1917550+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-27T16:45:49.191755+00:00","lastSuccessAt":"2026-10-27T16:45:49.3623941+00:00","error":null,"lastVerifiedAt":"2026-10-27T16:45:49.3623949+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-b877d586fc144938aa44089e665cd1e0","complete":true,"records":13434,"lastAttemptAt":"2026-10-27T16:46:14.7093171+00:00","lastSuccessAt":"2026-10-27T16:46:14.705+00:00","error":null,"lastVerifiedAt":"2026-10-27T16:46:14.705+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13497,"expectedIdentifiers":13497},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-439cd5d099ccb2499c5497741843190e65b167cf304db2a157938d3d4847a993","complete":true,"records":9783,"lastAttemptAt":"2026-10-27T16:45:44.9454366+00:00","lastSuccessAt":"2026-10-27T16:45:44.7050411+00:00","error":null,"lastVerifiedAt":"2026-10-27T16:45:44.9454366+00:00","snapshotPublishedAt":"2026-10-27T16:03:45+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-bad5d31e7f6a5e3d338e11d8789069b63620a403f927730769688b42f768e4f6","complete":true,"records":1965,"lastAttemptAt":"2026-10-27T16:43:56.7188167+00:00","lastSuccessAt":"2026-10-26T16:35:43.1460623+00:00","error":null,"lastVerifiedAt":"2026-10-27T16:43:56.7188167+00:00","snapshotPublishedAt":"2026-10-26T16:18:29+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-3a5b306d60fc44677a03a8afc99d87e6c5402770ef68d560f94a8c3ad3802b75","complete":true,"records":3001,"lastAttemptAt":"2026-10-27T16:45:49.1598297+00:00","lastSuccessAt":"2026-10-27T16:45:49.0050993+00:00","error":null,"lastVerifiedAt":"2026-10-27T16:45:49.1598297+00:00","snapshotPublishedAt":"2026-10-27T16:33:43+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-42822b9809dfe210feed0b7a563b95e683bae509605228dfdf3c43a4cf86d04d","complete":true,"records":230832,"lastAttemptAt":"2026-10-27T16:45:36.7397008+00:00","lastSuccessAt":"2026-10-27T16:45:35.4326335+00:00","error":null,"lastVerifiedAt":"2026-10-27T16:45:36.7397008+00:00","snapshotPublishedAt":"2026-10-27T16:33:47+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null}]}