CVE-2021-24036 json
Passing an attacker controlled size when creating an IOBuf could cause integer overflow, leading to an out of bounds write on the heap with…
published 2021-07-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10955
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.3%
- EPSS 3.3% chance of exploitation in 30 days, percentile 88%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
3.28% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Facebook folly
- Facebook HHVM
Classification
References
-
github.com
/facebook/folly/commit/4f304af1411e68851bdd00ef6140e9de4616f7d3
patch, third-party-advisory
-
hhvm.com
/blog/2021/07/20/security-update.html
product, vendor-advisory
-
facebook.com
/security/advisories/cve-2021-24036
vendor-advisory
Sources
- CVE List CVE-2021-24036
- NVD CVE-2021-24036
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