{"id":"CVE-2021-24029","aliases":["EUVD-2021-10949","GHSA-hjc6-5p5c-w4wg"],"status":"published","title":"A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC...","description":"A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a crash via a failed assertion. Per QUIC specification, this particular message should be treated as a connection error. This issue affects mvfst versions prior to commit a67083ff4b8dcbb7ee2839da6338032030d712b0 and proxygen versions prior to v2021.03.15.00.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01186,"percentile":0.68108,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-617"],"published":"2021-03-15T21:15:16Z","modified":"2026-11-01T19:19:46Z","products":[{"vendor":"facebook","product":"mvfst"},{"vendor":"facebook","product":"proxygen"}],"references":[{"url":"https://github.com/facebookincubator/mvfst/commit/a67083ff4b8dcbb7ee2839da6338032030d712b0","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://www.facebook.com/security/advisories/cve-2021-24029","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-24029"},{"url":"https://github.com/advisories/GHSA-hjc6-5p5c-w4wg"}],"sources":{"cve":[{"id":"CVE-2021-24029","description":"A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a crash via a failed assertion. Per QUIC specification, this particular message should be treated as a connection error. This issue affects mvfst versions prior to commit a67083ff4b8dcbb7ee2839da6338032030d712b0 and proxygen versions prior to v2021.03.15.00.","status":"published","published":"2021-03-15T21:15:16Z","modified":"2024-08-03T19:21:17.115Z","cwes":["CWE-617"],"updated_at":"2026-11-02T14:33:05.331617Z"}],"euvd":[{"id":"EUVD-2021-10949","description":"A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a crash via a failed assertion. Per QUIC specification, this particular message should be treated as a connection error. This issue affects mvfst versions prior to commit a67083ff4b8dcbb7ee2839da6338032030d712b0 and proxygen versions prior to v2021.03.15.00.","status":"published","published":"2021-03-15T21:15:16Z","modified":"2024-08-03T19:21:17Z","updated_at":"2026-11-03T03:24:59.661237Z"}],"ghsa":[{"id":"GHSA-hjc6-5p5c-w4wg","title":"A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC...","description":"A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a crash via a failed assertion. Per QUIC specification, this particular message should be treated as a connection error. This issue affects mvfst versions prior to commit a67083ff4b8dcbb7ee2839da6338032030d712b0 and proxygen versions prior to v2021.03.15.00.","status":"published","published":"2022-05-24T17:44:38Z","modified":"2023-01-29T05:06:05Z","cwes":["CWE-617"],"updated_at":"2026-11-02T14:45:56.584389Z"}],"nvd":[{"id":"CVE-2021-24029","description":"A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a crash via a failed assertion. Per QUIC specification, this particular message should be treated as a connection error. This issue affects mvfst versions prior to commit a67083ff4b8dcbb7ee2839da6338032030d712b0 and proxygen versions prior to v2021.03.15.00.","status":"published","published":"2021-03-15T22:15:13.53Z","modified":"2026-06-17T03:39:11.317Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-617"],"updated_at":"2026-11-02T14:06:50.805771Z"}],"osv":[{"id":"CVE-2021-24029","description":"A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a crash via a failed assertion. Per QUIC specification, this particular message should be treated as a connection error. This issue affects mvfst versions prior to commit a67083ff4b8dcbb7ee2839da6338032030d712b0 and proxygen versions prior to v2021.03.15.00.","status":"published","published":"2021-03-15T22:15:13.53Z","modified":"2026-11-01T19:19:46.924904568Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:18.778776Z"}]}}