{"schemaVersion":3,"id":"CVE-2021-25394","aliases":[],"status":"published","duplicateOf":null,"title":"Samsung Mobile Devices Race Condition Vulnerability","description":"A use after free vulnerability via race condition in MFC charger driver prior to SMR MAY-2021 Release 1 allows arbitrary write given a radio privilege is compromised.","dates":{"published":"2021-06-11T14:45:22.000Z","modified":"2025-10-21T23:25:42.595Z","reserved":null,"kevAdded":["2023-06-29T00:00:00.000Z"],"kevDue":["2023-07-20T00:00:00.000Z"]},"cvss":{"headline":{"score":6.4,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.4,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.4,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.4,"severity":"medium","vector":"AV:L/AC:M/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00401,"percentile":0.32974,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00401},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00401,"percentile":0.32974}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00401,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00401,"percentile":0.32974}]},"kev":{"state":"listed","entries":[{"source":"cisa","sourceLabel":"CISA","dateAdded":"2023-06-29T00:00:00.000Z","dueDate":"2023-07-20T00:00:00.000Z","requiredAction":"Apply updates per vendor instructions or discontinue use of the product if updates are unavailable","name":"Samsung Mobile Devices Race Condition Vulnerability","description":"Samsung mobile devices contain a race condition vulnerability within the MFC charger driver that leads to a use-after-free allowing for a write given a radio privilege is compromised.","notes":[{"type":"url","href":"https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=5","label":"security.samsungmobile.com/securityUpdate.smsb?year=2021&month=5"},{"type":"url","href":"https://nvd.nist.gov/vuln/detail/CVE-2021-25394","label":"nvd.nist.gov/vuln/detail/CVE-2021-25394"}],"vendor":"Samsung","product":"Mobile Devices","ransomware":false,"ransomwareUse":"Unknown","exploitationType":null}],"listedCount":1,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":true,"entry":{"source":"cisa","sourceLabel":"CISA","dateAdded":"2023-06-29T00:00:00.000Z","dueDate":"2023-07-20T00:00:00.000Z","requiredAction":"Apply updates per vendor instructions or discontinue use of the product if updates are unavailable","name":"Samsung Mobile Devices Race Condition Vulnerability","description":"Samsung mobile devices contain a race condition vulnerability within the MFC charger driver that leads to a use-after-free allowing for a write given a radio privilege is compromised.","notes":[{"type":"url","href":"https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=5","label":"security.samsungmobile.com/securityUpdate.smsb?year=2021&month=5"},{"type":"url","href":"https://nvd.nist.gov/vuln/detail/CVE-2021-25394","label":"nvd.nist.gov/vuln/detail/CVE-2021-25394"}],"vendor":"Samsung","product":"Mobile Devices","ransomware":false,"ransomwareUse":"Unknown","exploitationType":null}},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-416","name":"Use After Free","description":"The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","type":"weakness","status":"Stable","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/416.html"},{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","description":"The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/362.html"}],"affected":[{"vendor":"samsung mobile","product":"samsung mobile devices","name":"Samsung Mobile Devices","label":"samsung mobile devices","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ O(8.x), P(9.0), Q(10.0), R(11.0), < SMR MAY-2021 Release 1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ O(8.x), P(9.0), Q(10.0), R(11.0), < SMR MAY-2021 Release 1","eol":null,"hubHref":"/vendor/samsung_mobile/samsung_mobile_devices"},{"vendor":"samsung","product":"android","name":"android","label":"android","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"8.1","noFixRecorded":false,"fixedIn":null},{"text":"9.0:smr-apr-2021-r1","noFixRecorded":false,"fixedIn":null},{"text":"9.0:smr-feb-2021-r1","noFixRecorded":false,"fixedIn":null},{"text":"9.0:smr-jan-2021-r1","noFixRecorded":false,"fixedIn":null},{"text":"9.0:smr-mar-2021-r1","noFixRecorded":false,"fixedIn":null},{"text":"10.0:smr-apr-2021-r1","noFixRecorded":false,"fixedIn":null},{"text":"10.0:smr-feb-2021-r1","noFixRecorded":false,"fixedIn":null},{"text":"10.0:smr-jan-2021-r1","noFixRecorded":false,"fixedIn":null},{"text":"11.0:smr-apr-2021-r1","noFixRecorded":false,"fixedIn":null},{"text":"11.0:smr-feb-2021-r1","noFixRecorded":false,"fixedIn":null},{"text":"11.0:smr-jan-2021-r1","noFixRecorded":false,"fixedIn":null},{"text":"11.0:smr-jul-2021-r1","noFixRecorded":false,"fixedIn":null}],"versionsText":"8.1 | 9.0:smr-apr-2021-r1 | 9.0:smr-feb-2021-r1 | 9.0:smr-jan-2021-r1 | 9.0:smr-mar-2021-r1 | 10.0:smr-apr-2021-r1 | 10.0:smr-feb-2021-r1 | 10.0:smr-jan-2021-r1 | 11.0:smr-apr-2021-r1 | 11.0:smr-feb-2021-r1 | 11.0:smr-jan-2021-r1 | 11.0:smr-jul-2021-r1","eol":null,"hubHref":"/vendor/samsung/android"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=5","label":"security.samsungmobile.com/securityUpdate.smsb?year=2021&month=5","hostname":"security.samsungmobile.com","tags":["X Refsource MISC","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25394","label":"www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25394","hostname":"www.cisa.gov","tags":["Government Resource","US Government Resource"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-06-11T14:45:22.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"kev-added","date":"2023-06-29T00:00:00.000Z","label":"Added to CISA KEV","detail":"Samsung Mobile Devices Race Condition Vulnerability","source":"cisa"},{"kind":"kev-due","date":"2023-07-20T00:00:00.000Z","label":"CISA remediation due","detail":"Apply updates per vendor instructions or discontinue use of the product if updates are unavailable","source":"cisa"},{"kind":"modified","date":"2025-10-21T23:25:42.595Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":85,"level":"critical","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T16:23:07.523Z","stale":false,"partial":false}}