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5.5

Android telephony may block emergency calls

CVE-2021-39659 · published 4 years ago
Summary

A coding error in the Android telephony service can stop the phone from placing emergency calls in rare cases. The issue occurs when an unexpected error isn’t handled, which could temporarily prevent emergency dialing. Updating the device to the latest Android release or applying the vendor’s patch will fix the problem.

What to do
  • Update google platform/packages/services/telecomm to version 10:2022-01-01.
  • Update google platform/packages/services/telecomm to version 11:2022-01-01.
  • Update google platform/packages/services/telecomm to version 12:2022-01-01.
Affected software
Ecosystem VendorProductAffected versions
Android google platform/packages/services/telecomm >= 10:0, < 10:2022-01-01
>= 11:0, < 11:2022-01-01
>= 12:0, < 12:2022-01-01
Fix: upgrade to 10:2022-01-01
– google android 10.0
11.0
12.0
cpe:2.3:o:google:android:10.0:*:*:*:*:*:*:*
Original advisory text
In sortSimPhoneAccountsForEmergency of CreateConnectionProcessor.java, there is a possible prevention of access to emergency calling due to an unhandled exception. In rare instances, this could lea...
In sortSimPhoneAccountsForEmergency of CreateConnectionProcessor.java, there is a possible prevention of access to emergency calling due to an unhandled exception. In rare instances, this could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation.
References
Severity
5.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-755Improper Handling of Exceptional Conditions
Timeline
Published1 Jan 2022
Updated26 Oct 2026
First seen10 Sep 2026
Sources
ASB-A-208267659 · OSV
CVE-2021-39659 · NVD
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