CVE-2021-25394
MediumExploitedPublic exploitA 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.
Published Jun 11, 2021 · Updated Oct 30, 2025
Key Facts
Patch immediately- CVE-2021-25394 is a medium-severity vulnerability (CVSS 6.4 v3.1) affecting Android (Samsung), Samsung Mobile Devices.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 31, 2020. Public exploit code is available.
- EPSS estimates a 0.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including Samsung Mobile Devices SMR MAY-2021 Release 1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
6.4
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
0.4%
Higher than 32.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jun 29, 2023 | Jul 20, 2023 | Not reported |
| Industry KEV feed | Dec 31, 2020 | Jul 20, 2023 | Not reported |
| CIRCL KEV | Jun 29, 2023 | Jul 20, 2023 | Not reported |
| ENISA EUVD | Jun 29, 2023 | n/a | Not reported |
Required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable
Affected Products
13 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| AndroidSamsung | 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, 8.1 | n/a |
| Samsung Mobile Devices | >= O(8.x), P(9.0), Q(10.0), R(11.0) | SMR MAY-2021 Release 1 |
Patched Releases
Samsung Mobile Devices
SMR MAY-2021 Release 1
Timeline
Added to Industry KEV feed
Dec 31, 2020
Publicly disclosed
Jun 11, 2021
Added to CISA KEV
Jun 29, 2023
Added to CIRCL KEV
Jun 29, 2023
Added to ENISA EUVD
Jun 29, 2023
Last updated
Oct 30, 2025
Weakness Type
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
- CWE-416 Use After Free
References
FAQ
Common Questions.
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.
Affected: Android (Samsung) versions 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, 8.1; Samsung Mobile Devices versions >= O(8.x), P(9.0), Q(10.0), R(11.0). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 31, 2020.
Yes. It was added on Jun 29, 2023 with a federal remediation due date of Jul 20, 2023.
Public exploit code is available.
Fixed versions are available, including Samsung Mobile Devices SMR MAY-2021 Release 1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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