{"id":"CVE-2021-24036","details":"Passing an attacker controlled size when creating an IOBuf could cause integer overflow, leading to an out of bounds write on the heap with the possibility of remote code execution. This issue affects versions of folly prior to v2021.07.22.00. This issue affects HHVM versions prior to 4.80.5, all versions between 4.81.0 and 4.102.1, all versions between 4.103.0 and 4.113.0, and versions 4.114.0, 4.115.0, 4.116.0, 4.117.0, 4.118.0 and 4.118.1.","modified":"2026-04-11T13:53:56.135536Z","published":"2021-07-23T01:15:07.073Z","references":[{"type":"ADVISORY","url":"https://hhvm.com/blog/2021/07/20/security-update.html"},{"type":"ADVISORY","url":"https://www.facebook.com/security/advisories/cve-2021-24036"},{"type":"FIX","url":"https://github.com/facebook/folly/commit/4f304af1411e68851bdd00ef6140e9de4616f7d3"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/facebook/folly","events":[{"introduced":"0"},{"fixed":"4baba28200d7446c870e96f3cdbeb492f54625d0"},{"fixed":"4f304af1411e68851bdd00ef6140e9de4616f7d3"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"2021.07.22.00"}]}},{"type":"GIT","repo":"https://github.com/facebook/hhvm","events":[{"introduced":"0"},{"fixed":"00f8ad22201154c26b69a62306e0e7b2c6834444"},{"introduced":"75407bf7bfdd694f18e2660c4e78aeeacb07b622"},{"last_affected":"b87f02a6bf7a376ee884d7d3ecb22fd040390ba5"},{"introduced":"1ab4d92ac6ce6eff650e61088421b2d1494aaefe"},{"last_affected":"36499464ddf3e5d6312b90938066b8cac9ad89af"},{"introduced":"0"},{"last_affected":"0d13ab43c2f055125e5bd54eefb742421e9c6105"},{"introduced":"0"},{"last_affected":"904bbb75d5e1588c04fd1acf46d88d5026739302"},{"introduced":"0"},{"last_affected":"4743972f9e76b010edaf7625ff06b6d1a4ce54f1"},{"introduced":"0"},{"last_affected":"8af68470882132c7018944d46c5cb4f4f554d5dd"},{"introduced":"0"},{"last_affected":"6ffca5f13da641ecc1dbbb60f42270e1fe6a59c7"},{"introduced":"0"},{"last_affected":"c50a0e755fbab8c5305d4ec0a26df0236221560e"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"4.80.5"},{"introduced":"4.81.0"},{"last_affected":"4.102.1"},{"introduced":"4.103.0"},{"last_affected":"4.113.0"},{"introduced":"0"},{"last_affected":"4.114.0"},{"introduced":"0"},{"last_affected":"4.115.0"},{"introduced":"0"},{"last_affected":"4.116.0"},{"introduced":"0"},{"last_affected":"4.117.0"},{"introduced":"0"},{"last_affected":"4.118.0"},{"introduced":"0"},{"last_affected":"4.118.1"}]}}],"versions":["2016.07.26","HHVM-4.102.0","HHVM-4.102.1","HHVM-4.113.0","HHVM-4.114.0","HHVM-4.115.0","HHVM-4.116.0","HHVM-4.117.0","HHVM-4.118.0","HHVM-4.118.1","HHVM-4.80.0","HHVM-4.80.1","HHVM-4.80.2","HHVM-4.80.3","HHVM-4.80.4","HPHP-2.1.0","deprecate-dynamic-initializer","gcc-4.6","nightly-2019.03.28","nightly-2019.03.29","nightly-2019.03.30","nightly-2019.03.31","nightly-2019.04.01","nightly-2019.04.02","nightly-2019.04.03","nightly-2019.04.04","nightly-2019.04.05","nightly-2019.04.06","nightly-2019.04.07","nightly-2019.04.08","nightly-2019.04.09","nightly-2019.04.10","nightly-2019.04.11","nightly-2019.04.12","nightly-2019.04.13","nightly-2019.04.14","nightly-2019.04.15","nightly-2019.04.16","nightly-2019.04.17","nightly-2019.04.18","nightly-2019.04.19","nightly-2019.04.20","nightly-2019.04.21","nightly-2019.04.22","nightly-2019.04.23","nightly-2019.04.24","nightly-2019.04.25","nightly-2019.04.26","nightly-2019.04.27","nightly-2019.04.28","nightly-2019.04.29","nightly-2019.04.30","nightly-2019.05.01","nightly-2019.05.02","nightly-2019.05.03","nightly-2019.05.04","nightly-2019.05.05","nightly-2019.05.06","nightly-2019.05.07","nightly-2019.05.08","nightly-2019.05.09","nightly-2019.05.10","nightly-2019.05.11","nightly-2019.05.12","nightly-2019.05.13","nightly-2019.05.14","nightly-2019.05.15","nightly-2019.05.16","nightly-2019.05.17","nightly-2019.05.18","nightly-2019.05.19","nightly-2019.05.20","nightly-2019.05.21","nightly-2019.05.22","nightly-2019.05.23","nightly-2019.05.24","nightly-2019.05.25","nightly-2019.05.26","nightly-2019.05.27","nightly-2019.05.28","nightly-2019.05.29","nightly-2019.05.30","nightly-2019.05.31","nightly-2019.06.01","nightly-2019.06.02","nightly-2019.06.03","nightly-2019.06.04","nightly-2019.06.05","nightly-2019.06.06","nightly-2019.06.07","nightly-2019.06.08","nightly-2019.06.09","nightly-2019.06.10","nightly-2019.06.11","nightly-2019.06.12","nightly-2019.06.13","nightly-2019.06.14","nightly-2019.06.15","nightly-2019.06.16","nightly-2019.06.17","nightly-2019.06.18","nightly-2019.06.19","nightly-2019.06.20","nightly-2019.06.21","nightly-2019.06.22","nightly-2019.06.23","nightly-2019.06.24","nightly-2019.06.25","nightly-2019.06.26","nightly-2019.06.27","nightly-2019.06.28","nightly-2019.06.29","nightly-2019.06.30","nightly-2019.07.01","nightly-2019.07.02","nightly-2019.07.03","nightly-2019.07.04","nightly-2019.07.05","nightly-2019.07.06","nightly-2019.07.07","nightly-2019.07.08","nightly-2019.07.09","nightly-2019.07.10","nightly-2019.07.11","nightly-2019.07.12","nightly-2019.07.13","nightly-2019.07.14","nightly-2019.07.15","nightly-2019.07.16","nightly-2019.07.17","nightly-2019.07.18","nightly-2019.07.19","nightly-2019.07.20","nightly-2019.07.21","nightly-2019.07.22","nightly-2019.07.23","nightly-2019.07.24","nightly-2019.07.25","nightly-2019.07.26","nightly-2019.07.27","nightly-2019.07.28","nightly-2019.07.29","nightly-2019.07.30","nightly-2019.07.31","nightly-2019.08.01","nightly-2019.08.02","nightly-2019.08.03","nightly-2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