CVE-2021-30766 — Out-of-bounds Write in Apple Macos

CWE-787 — Out-of-bounds Write4 documents4 sources
Severity
7.8HIGHNVD
EPSS
0.5%
top 32.14%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Apple MacosApple Security Update CatalinaApple MAC OS X
Timeline
PublishedSep 8
Latest updateMay 24

Description

An out-of-bounds write was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. An application may be able to execute arbitrary code with kernel privileges.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages4 packages

▶CVEListV5apple/security_update_catalinaunspecified — 2021
▶CVEListV5apple/macosunspecified — 11.5+1
▶NVDapple/macos11.0 — 11.5
▶NVDapple/mac_os_x10.14 — 10.14.5+3

🔴Vulnerability Details

2
GHSA
GHSA-964m-f4fc-h2mf: An out-of-bounds write was addressed with improved input validation↗2022-05-24
▶
CVEList
CVE-2021-30766: An out-of-bounds write was addressed with improved input validation↗2021-09-08
▶

📋Vendor Advisories

1
Apple
CVE-2021-30766: Security Update 2021-005 Mojave↗2021-07-21
▶