{"id":"CVE-2021-3690","details":"A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.","aliases":["GHSA-fj7c-vg2v-ccrm"],"modified":"2026-03-20T04:10:59.439418Z","published":"2022-08-23T16:15:09.450Z","references":[{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2021-3690"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1991299"},{"type":"REPORT","url":"https://issues.redhat.com/browse/UNDERTOW-1935"},{"type":"FIX","url":"https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/libfuse/libfuse","events":[{"introduced":"0"},{"last_affected":"ce63733284dd6519d2f4ca03c6aa8a6caa328379"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.0"}]}},{"type":"GIT","repo":"https://github.com/undertow-io/undertow","events":[{"introduced":"0"},{"fixed":"225d62735b189e460a56460207b8c6073fcc3737"},{"introduced":"2291c7c07dc5bccf3b45c4db3a1b63123b8ce484"},{"fixed":"40926588d550bf28f583617d93a0a1520110a2d0"},{"fixed":"c7e84a0b7efced38506d7d1dfea5902366973877"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"2.0.40"},{"introduced":"2.1.0"},{"fixed":"2.2.10"}]}}],"versions":["2.1.0.Final","2.1.1.Final","2.1.2.Final","2.1.3.Final","2.1.4.Final","2.2.0.Final","2.2.1.Final","2.2.2.Final","2.2.3.Final","2.2.4.Final","2.2.5.Final","2.2.6.Final","2.2.7.Final","2.2.8.Final","2.2.9.Final","debian_version_0_95-1","debian_version_1_0-1","fuse_0_9","fuse_0_95","start"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"7.3"}]},{"events":[{"introduced":"0"},{"last_affected":"7.4"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-3690.json","vanir_signatures":[{"signature_version":"v1","deprecated":false,"digest":{"function_hash":"187851407789216287730490246308857511865","length":601},"source":"https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877","id":"CVE-2021-3690-45402648","signature_type":"Function","target":{"file":"websockets-jsr/src/main/java/io/undertow/websockets/jsr/FrameHandler.java","function":"onFullPongMessage"}},{"signature_version":"v1","deprecated":false,"digest":{"line_hashes":["79403700335528539273770068144736272793","79857656579781679713873665099933085318","244125084856819352952595829882912148068","137441744319017044843376062865140644092"],"threshold":0.9},"source":"https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877","id":"CVE-2021-3690-e32340ef","signature_type":"Line","target":{"file":"websockets-jsr/src/main/java/io/undertow/websockets/jsr/FrameHandler.java"}}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}