CVE-2020-27950 (GCVE-0-2020-27950)
Vulnerability from cvelistv5 – Published: 2020-12-08 20:17 – Updated: 2025-10-21 23:35Summary
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.
Severity
5.5 (Medium)
SSVC
Exploitation: active
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-29 17:35 UTC
CWE
- A malicious application may be able to disclose kernel memory..
- CWE-665 - Improper Initialization
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://support.apple.com/en-us/HT211931 | x_refsource_MISC |
| https://support.apple.com/en-us/HT211928 | x_refsource_MISC |
| https://support.apple.com/en-us/HT211929 | x_refsource_MISC |
| https://support.apple.com/en-us/HT211940 | x_refsource_MISC |
| https://support.apple.com/en-us/HT211944 | x_refsource_MISC |
| https://support.apple.com/en-us/HT211945 | x_refsource_MISC |
| https://support.apple.com/en-us/HT211946 | x_refsource_MISC |
| https://support.apple.com/en-us/HT211947 | x_refsource_MISC |
| http://seclists.org/fulldisclosure/2020/Dec/32 | mailing-listx_refsource_FULLDISC |
| http://packetstormsecurity.com/files/161296/XNU-K… | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
8 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apple | watchOS |
Affected:
unspecified , < 7.1
(custom)
|
guessed | |
| Apple | iOS and iPadOS |
Affected:
unspecified , < 14.2
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 11.0
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 12.4
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 6.2
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 5.3
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 2020
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 10.15
(custom)
|
guessed |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 20034324-c9a8-4e63-a34c-267a24ecc038
Exploited: Yes
Timestamps
First Seen: 2021-11-03
Asserted: 2021-11-03
Scope
Notes: Apple Multiple Products Memory Initialization Vulnerability | Affected: Apple / Multiple Products | Description: Apple iOS, iPadOS, macOS, and watchOS contain a memory initialization vulnerability that may allow a malicious application to disclose kernel memory. | Required action: Apply updates per vendor instructions. | Due date: 2022-05-03 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2020-27950
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-665 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Multiple Products |
| Due Date | 2022-05-03 |
| Date Added | 2021-11-03 |
| Vendorproject | Apple |
| Vulnerabilityname | Apple Multiple Products Memory Initialization Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 13:26 UTC
| Updated: 2026-11-04 13:01 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: f8b91f51-fb54-4d62-9e19-d9d28469c86f
Exploited: Yes
Timestamps
First Seen: 2021-11-03
Asserted: 2021-11-03
Scope
Notes: KEVIntel entry: 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... | Affected: Apple / watchOS, iOS and iPadOS, macOS | CVSS: 5.5 (MEDIUM) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | 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... |
| Vendor | Apple |
| Product | watchOS, iOS and iPadOS, macOS |
| Added Date | 2021-11-03T00:00:00.000Z |
| Cvss Score | 5.5 |
| Epss Score | None |
| Cvss Severity | MEDIUM |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 11:13 UTC
| Updated: 2026-06-23 11:13 UTC
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T16:25:43.906Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211931"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211928"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211929"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211940"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211944"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211945"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211946"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211947"
},
{
"name": "20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1",
"tags": [
"mailing-list",
"x_refsource_FULLDISC",
"x_transferred"
],
"url": "http://seclists.org/fulldisclosure/2020/Dec/32"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2020-27950",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-01-29T17:35:49.447107Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2021-11-03",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27950"
},
"type": "kev"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-665",
"description": "CWE-665 Improper Initialization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-21T23:35:32.054Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27950"
}
],
"timeline": [
{
"lang": "en",
"time": "2021-11-03T00:00:00.000Z",
"value": "CVE-2020-27950 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "watchOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "7.1",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "iOS and iPadOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "14.2",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "11.0",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "12.4",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "6.2",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "5.3",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "2020",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "10.15",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "A malicious application may be able to disclose kernel memory..",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-02-05T17:06:18.000Z",
"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"shortName": "apple"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211931"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211928"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211929"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211940"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211944"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211945"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211946"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211947"
},
{
"name": "20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1",
"tags": [
"mailing-list",
"x_refsource_FULLDISC"
],
"url": "http://seclists.org/fulldisclosure/2020/Dec/32"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "product-security@apple.com",
"ID": "CVE-2020-27950",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "watchOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "7.1"
}
]
}
},
{
"product_name": "iOS and iPadOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "14.2"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "11.0"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "12.4"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "6.2"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "5.3"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "2020"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "10.15"
}
]
}
}
]
},
"vendor_name": "Apple"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "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."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "A malicious application may be able to disclose kernel memory.."
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://support.apple.com/en-us/HT211931",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211931"
},
{
"name": "https://support.apple.com/en-us/HT211928",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211928"
},
{
"name": "https://support.apple.com/en-us/HT211929",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211929"
},
{
"name": "https://support.apple.com/en-us/HT211940",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211940"
},
{
"name": "https://support.apple.com/en-us/HT211944",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211944"
},
{
"name": "https://support.apple.com/en-us/HT211945",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211945"
},
{
"name": "https://support.apple.com/en-us/HT211946",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211946"
},
{
"name": "https://support.apple.com/en-us/HT211947",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211947"
},
{
"name": "20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1",
"refsource": "FULLDISC",
"url": "http://seclists.org/fulldisclosure/2020/Dec/32"
},
{
"name": "http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"assignerShortName": "apple",
"cveId": "CVE-2020-27950",
"datePublished": "2020-12-08T20:17:24.000Z",
"dateReserved": "2020-10-27T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:35:32.054Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"cisa_known_exploited": {
"cveID": "CVE-2020-27950",
"cwes": [
"CWE-665"
],
"dateAdded": "2021-11-03",
"dueDate": "2022-05-03",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2020-27950",
"product": "Multiple Products",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Apple iOS, iPadOS, macOS, and watchOS contain a memory initialization vulnerability that may allow a malicious application to disclose kernel memory.",
"vendorProject": "Apple",
"vulnerabilityName": "Apple Multiple Products Memory Initialization Vulnerability"
},
"epss": {
"cve": "CVE-2020-27950",
"date": "2026-11-12",
"epss": "0.1652",
"percentile": "0.9704"
},
"nvd": {
"cve": {
"cisaActionDue": "2022-05-03",
"cisaExploitAdd": "2021-11-03",
"cisaRequiredAction": "Apply updates per vendor instructions.",
"cisaVulnerabilityName": "Apple Multiple Products Memory Initialization Vulnerability",
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*",
"matchCriteriaId": "8768B67A-43ED-4726-A99F-A0A57A9A2CEC",
"versionEndExcluding": "14.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",
"matchCriteriaId": "778712BB-D27F-4B41-9B79-7C896B7B1E08",
"versionEndExcluding": "12.4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1DAFF28B-980D-4D09-BD3B-FC3F14B4BA49",
"versionEndExcluding": "14.2",
"versionStartIncluding": "14.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
"matchCriteriaId": "3BD2A211-4E62-40BF-9BA0-5239FA6F0AF8",
"versionEndExcluding": "10.15.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
"matchCriteriaId": "76BFC9D4-7D15-4C23-A54A-3F5A0B8BC542",
"versionEndExcluding": "11.0.1",
"versionStartIncluding": "11.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B9007C2C-CE11-4D30-9BE1-7FD4B2687B41",
"versionEndExcluding": "5.3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0199758F-1C5B-4462-8F81-A9805147FC7D",
"versionEndExcluding": "6.2.9",
"versionStartIncluding": "6.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*",
"matchCriteriaId": "3877CFE3-88D5-429F-87AA-69AA49A8C5DF",
"versionEndExcluding": "7.1",
"versionStartIncluding": "7.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Se abord\u00f3 un problema de inicializaci\u00f3n de la memoria.\u0026#xa0;Este problema se corrigi\u00f3 en macOS Big Sur versi\u00f3n 11.0.1, watchOS versi\u00f3n 7.1, iOS versi\u00f3n 12.4.9, watchOS versi\u00f3n 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS versi\u00f3n 14.2 y iPadOS versi\u00f3n 14.2, watchOS versi\u00f3n 5.3.9, macOS Catalina versi\u00f3n 10.15.7 Supplemental Update, macOS Catalina versi\u00f3n 10.15.7 Update.\u0026#xa0;Una aplicaci\u00f3n maliciosa puede ser capaz de revelar la memoria del kernel"
}
],
"id": "CVE-2020-27950",
"lastModified": "2025-10-27T17:38:39.557",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 7.1,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:M/Au:N/C:C/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 6.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": true
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
},
"published": "2020-12-08T21:15:13.967",
"references": [
{
"source": "product-security@apple.com",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html"
},
{
"source": "product-security@apple.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://seclists.org/fulldisclosure/2020/Dec/32"
},
{
"source": "product-security@apple.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211928"
},
{
"source": "product-security@apple.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211929"
},
{
"source": "product-security@apple.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211931"
},
{
"source": "product-security@apple.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211940"
},
{
"source": "product-security@apple.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211944"
},
{
"source": "product-security@apple.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211945"
},
{
"source": "product-security@apple.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211946"
},
{
"source": "product-security@apple.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211947"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://seclists.org/fulldisclosure/2020/Dec/32"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211928"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211929"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211931"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211940"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211944"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211945"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211946"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/HT211947"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"US Government Resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27950"
}
],
"sourceIdentifier": "product-security@apple.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-665"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-665"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T16:25:43.906Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211931"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211928"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211929"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211940"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211944"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211945"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211946"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT211947"
},
{
"name": "20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1",
"tags": [
"mailing-list",
"x_refsource_FULLDISC",
"x_transferred"
],
"url": "http://seclists.org/fulldisclosure/2020/Dec/32"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2020-27950",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-01-29T17:35:49.447107Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2021-11-03",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27950"
},
"type": "kev"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-665",
"description": "CWE-665 Improper Initialization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-01-29T17:27:10.130Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27950"
}
],
"timeline": [
{
"lang": "en",
"time": "2021-11-03T00:00:00.000Z",
"value": "CVE-2020-27950 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "watchOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "7.1",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "iOS and iPadOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "14.2",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "11.0",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "12.4",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "6.2",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "5.3",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "2020",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "10.15",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "A malicious application may be able to disclose kernel memory..",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-02-05T17:06:18.000Z",
"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"shortName": "apple"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211931"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211928"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211929"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211940"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211944"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211945"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211946"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT211947"
},
{
"name": "20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1",
"tags": [
"mailing-list",
"x_refsource_FULLDISC"
],
"url": "http://seclists.org/fulldisclosure/2020/Dec/32"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "product-security@apple.com",
"ID": "CVE-2020-27950",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "watchOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "7.1"
}
]
}
},
{
"product_name": "iOS and iPadOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "14.2"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "11.0"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "12.4"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "6.2"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "5.3"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "2020"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "10.15"
}
]
}
}
]
},
"vendor_name": "Apple"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "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."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "A malicious application may be able to disclose kernel memory.."
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://support.apple.com/en-us/HT211931",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211931"
},
{
"name": "https://support.apple.com/en-us/HT211928",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211928"
},
{
"name": "https://support.apple.com/en-us/HT211929",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211929"
},
{
"name": "https://support.apple.com/en-us/HT211940",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211940"
},
{
"name": "https://support.apple.com/en-us/HT211944",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211944"
},
{
"name": "https://support.apple.com/en-us/HT211945",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211945"
},
{
"name": "https://support.apple.com/en-us/HT211946",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211946"
},
{
"name": "https://support.apple.com/en-us/HT211947",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT211947"
},
{
"name": "20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1",
"refsource": "FULLDISC",
"url": "http://seclists.org/fulldisclosure/2020/Dec/32"
},
{
"name": "http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"assignerShortName": "apple",
"cveId": "CVE-2020-27950",
"datePublished": "2020-12-08T20:17:24.000Z",
"dateReserved": "2020-10-27T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:35:32.054Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.