Unrated
iOS and iPadOS, macOS and 3 more products — security advisory
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An app may be able to cause unexpected system termination.
- Products
- iOS and iPadOS, macOS, tvOS, visionOS, watchOS
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-20637
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 21:39 UTC · Revision 1
Source evidence
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An app may be able to cause unexpected system termination.
cve:CVE-2026-20637
iOS and iPadOS
Fixed versions: Not specified
macOS
Fixed versions: Not specified
tvOS
Fixed versions: Not specified
visionOS
Fixed versions: Not specified
watchOS
Fixed versions: Not specified
Complete source record
{
"id": "b21426b186eb09789f33154f9921c717749636bc9513ab74b39f3e82fdb37842",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-20637",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2026-20637",
"summary": "A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An app may be able to cause unexpected system termination.",
"evidence": "cve:CVE-2026-20637",
"products": [
{
"name": {
"value": "iOS and iPadOS",
"evidence": "/containers/cna/affected/0/product"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": []
},
{
"name": {
"value": "macOS",
"evidence": "/containers/cna/affected/1/product"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": []
},
{
"name": {
"value": "tvOS",
"evidence": "/containers/cna/affected/2/product"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": []
},
{
"name": {
"value": "visionOS",
"evidence": "/containers/cna/affected/3/product"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": []
},
{
"name": {
"value": "watchOS",
"evidence": "/containers/cna/affected/4/product"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CVE-2026-20637",
"aliases": [
"CVE-2026-20637"
],
"metrics": [],
"affected": [
{
"vendor": "Apple",
"product": "iOS and iPadOS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "18.7.7",
"versionType": "custom"
},
{
"status": "affected",
"version": "0",
"lessThan": "26.3",
"versionType": "custom"
}
]
},
{
"vendor": "Apple",
"product": "macOS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "14.8.5",
"versionType": "custom"
},
{
"status": "affected",
"version": "0",
"lessThan": "15.7.5",
"versionType": "custom"
},
{
"status": "affected",
"version": "0",
"lessThan": "26.3",
"versionType": "custom"
}
]
},
{
"vendor": "Apple",
"product": "tvOS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "26.3",
"versionType": "custom"
}
]
},
{
"vendor": "Apple",
"product": "visionOS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "26.3",
"versionType": "custom"
}
]
},
{
"vendor": "Apple",
"product": "watchOS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "26.3",
"versionType": "custom"
}
]
}
],
"modified": "2026-10-26T20:38:12.757Z",
"provider": "cve",
"references": [
"https://support.apple.com/en-us/126346",
"https://support.apple.com/en-us/126348",
"https://support.apple.com/en-us/126351",
"https://support.apple.com/en-us/126352",
"https://support.apple.com/en-us/126353",
"https://support.apple.com/en-us/126793",
"https://support.apple.com/en-us/126795",
"https://support.apple.com/en-us/126796"
],
"provider_metadata": {
"adp": [
{
"title": "CISA ADP Vulnrichment",
"metrics": [
{
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 6.2,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
}
},
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-20637",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-03-25T15:48:17.344532Z"
}
}
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"type": "CWE",
"cweId": "CWE-416",
"description": "CWE-416 Use After Free"
}
]
}
],
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-03-25T15:48:41.578Z"
}
}
],
"cna": {
"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"shortName": "apple",
"dateUpdated": "2026-10-26T20:38:12.757Z"
}
}
},
"related_cves": [
{
"value": "CVE-2026-20637",
"evidence": "/cveMetadata/cveId"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-cve",
"document_id": 344342,
"published_at": "2026-03-25T00:32:10.184+00:00"
}