Security readout for executives and security teams
Plain-English summary
CVE-2020-27947 is a macOS kernel-level memory corruption issue. Apple says an application may execute arbitrary code with kernel privileges. That means a vulnerable Mac could let malicious or compromised software gain very deep system control if the device has not received Apple’s fixed updates.
Executive priority
Treat this as high priority for macOS patch compliance because the stated impact reaches kernel privileges. Urgency is strongest for older Macs or fleets with delayed Apple security updates. The sources do not support claiming active exploitation.
Technical view
Apple describes this as memory corruption addressed by improved input validation. The public record names macOS as affected and fixes in macOS Big Sur 11.1, Security Update 2020-001 Catalina, and Security Update 2020-007 Mojave. No CVSS, CWE, affected component, or detailed version range is provided.
Likely exposure
Exposure is most likely on Macs running vulnerable macOS builds before Big Sur 11.1, Catalina Security Update 2020-001, or Mojave Security Update 2020-007. The provided sources do not define exact vulnerable version ranges beyond those fixed releases.
Exploitation context
The documented impact is arbitrary code execution with kernel privileges by an application. The source bundle does not show CISA KEV listing, active exploitation, public exploit availability, or exploitation prerequisites beyond application-level involvement.
Researcher notes
Public detail is limited. Apple and CVE records do not name the vulnerable subsystem, trigger conditions, CVSS score, CWE, or proof-of-concept status. Analysis should stay focused on patch state and fleet exposure rather than exploit assumptions.
Mitigation direction
- Apply macOS Big Sur 11.1 where applicable.
- Apply Security Update 2020-001 on Catalina systems.
- Apply Security Update 2020-007 on Mojave systems.
- Check Apple guidance for currently supported upgrade paths.
- Prioritize unmanaged or delayed-patch Mac fleets.
Validation and detection
- Inventory macOS versions across the fleet.
- Confirm whether the named Apple updates are installed.
- Identify Catalina and Mojave hosts missing their security updates.
- Verify patch status through endpoint management records.
- Track exceptions for devices unable to update.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-27947 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://support.apple.com/en-us/HT212011CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.