CVE-2021-25477
An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows...
An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.
- Record
CVE-2021-25477- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-415
- Updated
- 2026-11-02
EUVDEUVD-2021-12373
An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.
- Record
EUVD-2021-12373- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r436-49p3-g4hr No score
An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows...
An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.
- Record
GHSA-r436-49p3-g4hr- Weakness
- CWE-415
- Updated
- 2026-11-02
NVD
An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.
- Record
CVE-2021-25477- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:N/I:N/A:P - Weakness
- CWE-415
- Updated
- 2026-11-02
OSVASB-A-220262213 No score
In Modem LTE RRC, there is a possible memory corruption due to a double free. This could lead to remote denial of service when decoding an incorrect ASN.1 data with no additional execution privileges needed. User interaction is not needed for exploitation.
- Record
ASB-A-220262213- Updated
- 2026-11-05
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
:unknown:Android |
SoCVersion:0 up to SoCVersion:2022-04-05, plus listed versions SoCVersion |
SoCVersion:2022-04-05 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-25477 is a medium vulnerability (CVSS 4.4) in Google Android, published October 6, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.50%, the 42nd percentile. Fixed in :unknown: SoCVersion:2022-04-05.