Description
A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Apple | watchOS | >= unspecified, < 7.1 |
| Apple | iOS and iPadOS | >= unspecified, < 14.2 |
| Apple | macOS | >= unspecified, < 11.0 |
| Apple | macOS | >= unspecified, < 12.4 |
| Apple | macOS | >= unspecified, < 6.2 |
| Apple | macOS | >= unspecified, < 5.3 |
| Apple | macOS | >= unspecified, < 2020 |
| Apple | macOS | >= unspecified, < 10.15 |
References
- http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
- https://support.apple.com/en-us/HT211928Vendor Advisory
- https://support.apple.com/en-us/HT211929Vendor Advisory
- https://support.apple.com/en-us/HT211931Vendor Advisory
- https://support.apple.com/en-us/HT211940Vendor Advisory
- https://support.apple.com/en-us/HT211944Vendor Advisory
- https://support.apple.com/en-us/HT211945Vendor Advisory
- https://support.apple.com/en-us/HT211946Vendor Advisory
- https://support.apple.com/en-us/HT211947Vendor Advisory
- http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
- https://support.apple.com/en-us/HT211928Vendor Advisory
- https://support.apple.com/en-us/HT211929Vendor Advisory
- https://support.apple.com/en-us/HT211931Vendor Advisory
- https://support.apple.com/en-us/HT211940Vendor Advisory
- https://support.apple.com/en-us/HT211944Vendor Advisory
- https://support.apple.com/en-us/HT211945Vendor Advisory
- https://support.apple.com/en-us/HT211946Vendor Advisory
- https://support.apple.com/en-us/HT211947Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27950US Government Resource
Timeline
- Published
- Dec 8, 2020
- Last modified
- Jun 17, 2026
- Added to CISA KEV
- Nov 3, 2021
- NVD status
- Analyzed