CVE-2021-24036

CRITICAL

Facebook Folly < 2021.07.22.00 and HHVM < 4.80.5 - Heap-Based Buffer Overflow via IOBuf Size Mismanagement

Title source: llm
STIX 2.1

Description

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.

References (3)

Core 3

Scores

CVSS v3 9.8
EPSS 0.0328
EPSS Percentile 86.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-122 CWE-190
Status published
Products (8)
facebook/folly < 2021.07.22.00
facebook/hhvm 4.114.0
facebook/hhvm 4.115.0
facebook/hhvm 4.116.0
facebook/hhvm 4.117.0
facebook/hhvm 4.118.0
facebook/hhvm 4.118.1
facebook/hhvm < 4.80.5
Published Jul 23, 2021
Tracked Since Feb 18, 2026