CVE-2020-27917 json
A use after free issue was addressed with improved memory management.
published 2020-12-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20410
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 14.2 and iPadOS 14.2, iCloud for Windows 11.5, tvOS 14.2, iTunes 12.11 for Windows. Processing maliciously crafted web content may lead to code execution.
Patch / fix
- Apple watchOS 7.1
- Apple iOS and iPadOS 14.2
- Apple tvOS 14.2
- Apple macOS 11.0, 11.5, 12.11
Exploit prediction
1.72% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Affected products
- Apple watchOS
- Apple iOS and iPadOS
- Apple tvOS
- Apple macOS
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
support.apple.com
/en-us/HT211931
vendor-advisory
-
support.apple.com
/en-us/HT211935
vendor-advisory
-
support.apple.com
/en-us/HT211928
vendor-advisory
-
support.apple.com
/en-us/HT211929
vendor-advisory
-
support.apple.com
/en-us/HT211930
vendor-advisory
-
support.apple.com
/en-us/HT211933
vendor-advisory
-
seclists.org
/fulldisclosure/2020/Dec/32
mailing-list, third-party-advisory
Sources
- CVE List CVE-2020-27917
- NVD CVE-2020-27917
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.