CVE-2021-1048 (GCVE-0-2021-1048)
Vulnerability from cvelistv5
Published
2021-12-15 18:05
Modified
2025-07-30 01:37
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- Elevation of privilege
Summary
In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204573007References: Upstream kernel
References
| ► | URL | Tags | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
CISA Known exploited vulnerability
Data from the Known Exploited Vulnerabilities Catalog
Date added: 2022-05-23
Due date: 2022-06-13
Required action: Apply updates per vendor instructions.
Used in ransomware: Unknown
Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-1048
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T15:55:18.641Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://source.android.com/security/bulletin/2021-11-01"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2021-1048",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-04T19:28:18.249054Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2022-05-23",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1048"
},
"type": "kev"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-07-30T01:37:51.547Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"timeline": [
{
"lang": "en",
"time": "2022-05-23T00:00:00+00:00",
"value": "CVE-2021-1048 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Android",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Android kernel"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204573007References: Upstream kernel"
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Elevation of privilege",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-12-15T18:05:35.000Z",
"orgId": "baff130e-b8d5-4e15-b3d3-c3cf5d5545c6",
"shortName": "google_android"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://source.android.com/security/bulletin/2021-11-01"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security@android.com",
"ID": "CVE-2021-1048",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Android",
"version": {
"version_data": [
{
"version_value": "Android kernel"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204573007References: Upstream kernel"
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Elevation of privilege"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://source.android.com/security/bulletin/2021-11-01",
"refsource": "MISC",
"url": "https://source.android.com/security/bulletin/2021-11-01"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "baff130e-b8d5-4e15-b3d3-c3cf5d5545c6",
"assignerShortName": "google_android",
"cveId": "CVE-2021-1048",
"datePublished": "2021-12-15T18:05:35.000Z",
"dateReserved": "2020-11-06T00:00:00.000Z",
"dateUpdated": "2025-07-30T01:37:51.547Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"cisa_known_exploited": {
"cveID": "CVE-2021-1048",
"cwes": "[\"CWE-416\"]",
"dateAdded": "2022-05-23",
"dueDate": "2022-06-13",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2021-1048",
"product": "Kernel",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Android kernel contains a use-after-free vulnerability that allows for privilege escalation.",
"vendorProject": "Android",
"vulnerabilityName": "Android Kernel Use-After-Free Vulnerability"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-1048\",\"sourceIdentifier\":\"security@android.com\",\"published\":\"2021-12-15T19:15:14.917\",\"lastModified\":\"2025-04-04T13:05:45.083\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204573007References: Upstream kernel\"},{\"lang\":\"es\",\"value\":\"En la funci\u00f3n ep_loop_check_proc del archivo eventpoll.c, se presenta una posible forma de corromper la memoria debido a un uso de memoria previamente liberada. Esto podr\u00eda conllevar a una escalada local de privilegios sin ser necesarios privilegios de ejecuci\u00f3n adicionales. No es requerida una interacci\u00f3n del usuario para su explotaci\u00f3n. Producto: Android. Versiones: Android kernel. ID de Android: A-204573007. Referencias: Kernel ascendente\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:C/I:C/A:C\",\"baseScore\":7.2,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":3.9,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"cisaExploitAdd\":\"2022-05-23\",\"cisaActionDue\":\"2022-06-13\",\"cisaRequiredAction\":\"Apply updates per vendor instructions.\",\"cisaVulnerabilityName\":\"Android Kernel Use-After-Free Vulnerability\",\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:google:android:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F8B9FEC8-73B6-43B8-B24E-1F7C20D91D26\"}]}]}],\"references\":[{\"url\":\"https://source.android.com/security/bulletin/2021-11-01\",\"source\":\"security@android.com\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://source.android.com/security/bulletin/2021-11-01\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]}]}}",
"vulnrichment": {
"containers": "{\"cna\": {\"affected\": [{\"product\": \"Android\", \"vendor\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"Android kernel\"}]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204573007References: Upstream kernel\"}], \"problemTypes\": [{\"descriptions\": [{\"description\": \"Elevation of privilege\", \"lang\": \"en\", \"type\": \"text\"}]}], \"providerMetadata\": {\"dateUpdated\": \"2021-12-15T18:05:35.000Z\", \"orgId\": \"baff130e-b8d5-4e15-b3d3-c3cf5d5545c6\", \"shortName\": \"google_android\"}, \"references\": [{\"tags\": [\"x_refsource_MISC\"], \"url\": \"https://source.android.com/security/bulletin/2021-11-01\"}], \"x_legacyV4Record\": {\"CVE_data_meta\": {\"ASSIGNER\": \"security@android.com\", \"ID\": \"CVE-2021-1048\", \"STATE\": \"PUBLIC\"}, \"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"product_name\": \"Android\", \"version\": {\"version_data\": [{\"version_value\": \"Android kernel\"}]}}]}, \"vendor_name\": \"n/a\"}]}}, \"data_format\": \"MITRE\", \"data_type\": \"CVE\", \"data_version\": \"4.0\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204573007References: Upstream kernel\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"Elevation of privilege\"}]}]}, \"references\": {\"reference_data\": [{\"name\": \"https://source.android.com/security/bulletin/2021-11-01\", \"refsource\": \"MISC\", \"url\": \"https://source.android.com/security/bulletin/2021-11-01\"}]}}}, \"adp\": [{\"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T15:55:18.641Z\"}, \"title\": \"CVE Program Container\", \"references\": [{\"tags\": [\"x_refsource_MISC\", \"x_transferred\"], \"url\": \"https://source.android.com/security/bulletin/2021-11-01\"}]}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-1048\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-02-04T19:28:18.249054Z\"}}}, {\"other\": {\"type\": \"kev\", \"content\": {\"dateAdded\": \"2022-05-23\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1048\"}}}], \"timeline\": [{\"time\": \"2022-05-23T00:00:00+00:00\", \"lang\": \"en\", \"value\": \"CVE-2021-1048 added to CISA KEV\"}], \"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\": \"2025-02-04T19:27:56.070Z\"}}]}",
"cveMetadata": "{\"assignerOrgId\": \"baff130e-b8d5-4e15-b3d3-c3cf5d5545c6\", \"assignerShortName\": \"google_android\", \"cveId\": \"CVE-2021-1048\", \"datePublished\": \"2021-12-15T18:05:35.000Z\", \"dateReserved\": \"2020-11-06T00:00:00.000Z\", \"dateUpdated\": \"2025-07-30T01:37:51.547Z\", \"state\": \"PUBLISHED\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…