High severity7.8NVD Advisory· Published Apr 2, 2021· Updated Jun 17, 2026
CVE-2021-1805
CVE-2021-1805
Description
An out-of-bounds write was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.2.1, macOS Catalina 10.15.7 Supplemental Update, macOS Mojave 10.14.6 Security Update 2021-002. An application may be able to execute arbitrary code with kernel privileges.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2Big Sur <11.2.1, Catalina <10.15.7, Mojave <10.14.6+ 1 more
- (no CPE)range: Big Sur <11.2.1, Catalina <10.15.7, Mojave <10.14.6
- (no CPE)range: unspecified
Patches
Vulnerability mechanics
References
3- seclists.org/fulldisclosure/2021/Apr/54nvdMailing ListThird Party Advisory
- support.apple.com/en-us/HT212177nvdVendor Advisory
- support.apple.com/kb/HT212327nvdVendor Advisory
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