CVE-2021-1764 json
A use after free issue was addressed with improved memory management.
published 2021-04-02 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7228
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.0%
- EPSS 2.0% chance of exploitation in 30 days, percentile 81%
- 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 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause a denial of service.
Patch / fix
- Apple iOS and iPadOS 14.4
- Apple macOS 7.3, 11.2, 14.4
Exploit prediction
2.02% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- Apple iOS and iPadOS
- Apple macOS
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
support.apple.com
/en-us/HT212147
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212146
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212148
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212149
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-1764
- NVD CVE-2021-1764
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.