Apple watchOS: A malicious application may be able to disclose kernel memory
Priority HIGH 82Exploited in the wildCWE-665Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation Active In CISA KEV since 2021-11-03CISA due date 2022-05-03
EPSS 0.1652 97th percentileScored 2026-11-07
Fix Fixed watchOS (Apple): 7.1iOS and iPadOS (Apple): 14.2+1 more product
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apple | watchOS | before 7.1 | 7.1 | Patch available | CNA |
| Apple | iOS and iPadOS | before 14.2 | 14.2 | Patch available | CNA |
| Apple | macOS | before 11.0 | 11.0 | Patch available | CNA |
| Apple | macOS | before 12.4 | 12.4 | Patch available | CNA |
| Apple | macOS | before 6.2 | 6.2 | Patch available | CNA |
| Apple | macOS | before 5.3 | 5.3 | Patch available | CNA |
| Apple | macOS | before 2020 | 2020 | Patch available | CNA |
| Apple | macOS | before 10.15 | 10.15 | Patch available | CNA |
- watchOS VendorApple Affected before 7.1 Fixed in 7.1 Patch available CNA
- iOS and iPadOS VendorApple Affected before 14.2 Fixed in 14.2 Patch available CNA
- macOS VendorApple Affected before 11.0 Fixed in 11.0 Patch available CNA
- macOS VendorApple Affected before 12.4 Fixed in 12.4 Patch available CNA
- macOS VendorApple Affected before 6.2 Fixed in 6.2 Patch available CNA
- macOS VendorApple Affected before 5.3 Fixed in 5.3 Patch available CNA
- macOS VendorApple Affected before 2020 Fixed in 2020 Patch available CNA
- macOS VendorApple Affected before 10.15 Fixed in 10.15 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* | before 14.2 | Vulnerable | Apple |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | before 12.4.9; 14.0 to before 14.2 | Vulnerable | Apple |
| cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* | before 10.15.7; 11.0 to before 11.0.1 | Vulnerable | Apple |
| cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* | before 5.3.9; 6.0 to before 6.2.9; 7.0 to before 7.1 | Vulnerable | Apple |
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.2 Vulnerable ·Apple
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 12.4.9; 14.0 to before 14.2 Vulnerable ·Apple
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 10.15.7; 11.0 to before 11.0.1 Vulnerable ·Apple
- cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 5.3.9; 6.0 to before 6.2.9; 7.0 to before 7.1 Vulnerable ·Apple
Remediation
- Fix · CNA watchOS (Apple) Fixed in 7.1
- Fix · CNA iOS and iPadOS (Apple) Fixed in 14.2
- Fix · CNA macOS (Apple) Fixed in 11.0
- Fix · CNA macOS (Apple) Fixed in 12.4
- Fix · CNA macOS (Apple) Fixed in 6.2
- Fix · CNA macOS (Apple) Fixed in 5.3
- Fix · CNA macOS (Apple) Fixed in 2020
- Fix · CNA macOS (Apple) Fixed in 10.15
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Apple macOS 11.0
45 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH, 4 MEDIUM, 38 LOW
Other records, highest priority first
- TI-2020-16987 Type confusion in Apple watchOSPriority CRITICAL 93
- TI-2020-16985 Out-of-bounds write in Apple watchOSPriority CRITICAL 93
- TI-2020-08068 Out-of-bounds write in Apple macOSPriority MEDIUM 45
- Release ·
Apple iOS and iPadOS 14.2
22 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH, 1 MEDIUM, 18 LOW
Other records, highest priority first
- TI-2020-16987 Type confusion in Apple watchOSPriority CRITICAL 93
- TI-2020-16985 Out-of-bounds write in Apple watchOSPriority CRITICAL 93
- TI-2020-16968 Integer overflow in Apple watchOSPriority MEDIUM 40
Show 3 more groups
- Release ·
Apple watchOS 7.1
18 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH, 1 MEDIUM, 14 LOW
Other records, highest priority first
- TI-2020-16987 Type confusion in Apple watchOSPriority CRITICAL 93
- TI-2020-16985 Out-of-bounds write in Apple watchOSPriority CRITICAL 93
- TI-2020-16968 Integer overflow in Apple watchOSPriority MEDIUM 40
- Release ·
Apple macOS 10.15
8 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH, 5 LOW
Other records, highest priority first
- TI-2020-16987 Type confusion in Apple watchOSPriority CRITICAL 93
- TI-2020-16985 Out-of-bounds write in Apple watchOSPriority CRITICAL 93
- TI-2020-08051 Use after free in Apple tvOSPriority LOW 37
- Release ·
Apple macOS 12.4, 2020 and 2 more versions
3 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH
Other records, highest priority first
- TI-2020-16987 Type confusion in Apple watchOSPriority CRITICAL 93
- TI-2020-16985 Out-of-bounds write in Apple watchOSPriority CRITICAL 93
Timeline
- 2021-11-03 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2020-27950
- 2026-10-03 Alias added: GHSA-76v6-7m6g-p6v4
References
Advisory 10
- https://support.apple.com/en-us/HT211931
- https://support.apple.com/en-us/HT211928
- https://support.apple.com/en-us/HT211929
- 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
- 20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1
- http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html
More Apple Ipados vulnerabilities
- TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
- TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
- TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
- TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
- TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
- TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-27950 · CVE Program
- CVE-2020-27950 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-76v6-7m6g-p6v4 · GitHub Advisory Database · CC BY 4.0
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