CVE-2020-27950
Apple Inc. · published 2020-12-08
Source record Collected from the National Vulnerability Database (NVD)
CISA Known Exploited Vulnerabilities
CISA lists this CVE as known exploited (added 2021-11-03).
- CISA's name for it: Apple Multiple Products Memory Initialization Vulnerability
- CISA's description: Apple iOS, iPadOS, macOS, and watchOS contain a memory initialization vulnerability that may allow a malicious application to disclose kernel memory.
- Known ransomware campaign use, per CISA: Unknown
Source: CISA KEV catalog (CC0 1.0).
Description
Description by Apple Inc. via the CVE Program.
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.
Status at the source
- NVD status: Analyzed
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Apple | watchOS | unspecified – before 7.1: affected |
| Apple | iOS and iPadOS | unspecified – before 14.2: affected |
| Apple | macOS | unspecified – before 11.0: affected |
| Apple | macOS | unspecified – before 12.4: affected |
| Apple | macOS | unspecified – before 6.2: affected |
| Apple | macOS | unspecified – before 5.3: affected |
| Apple | macOS | unspecified – before 2020: affected |
| Apple | macOS | unspecified – before 10.15: affected |
Products named in NVD's CPE match criteria (4)
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 5.5 MEDIUM — as published by NIST (Primary)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - CVSS 3.1: 5.5 MEDIUM — as published by CISA-ADP (Secondary)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - CVSS 2.0: 7.1 HIGH — as published by NIST (Primary)
AV:N/AC:M/Au:N/C:C/I:N/A:N - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: active · Automatable: no · Technical impact: partial
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html
- http://seclists.org/fulldisclosure/2020/Dec/32
- https://support.apple.com/en-us/HT211928
- https://support.apple.com/en-us/HT211929
- https://support.apple.com/en-us/HT211931
- https://support.apple.com/en-us/HT211940
- https://support.apple.com/en-us/HT211944
- https://support.apple.com/en-us/HT211945
- https://support.apple.com/en-us/HT211946
- https://support.apple.com/en-us/HT211947
- http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html
- http://seclists.org/fulldisclosure/2020/Dec/32
- https://support.apple.com/en-us/HT211928
- https://support.apple.com/en-us/HT211929
- https://support.apple.com/en-us/HT211931
- https://support.apple.com/en-us/HT211940
- https://support.apple.com/en-us/HT211944
- https://support.apple.com/en-us/HT211945
- https://support.apple.com/en-us/HT211946
- https://support.apple.com/en-us/HT211947
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27950
Source dates: published 2020-12-08, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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