Google Android Telephonycore: Denial of Service due to uncaught exception
Summary
A flaw in the Android Telephonycore component (cellular telephony stack, delivered as a Project Mainline module) allows a denial of service caused by an uncaught exception. The CVE record also describes a possible local escalation of privilege, while the bulletin lists the entry as DoS. An attacker needs local access with low privileges, such as a malicious or compromised app already on the device, and no user interaction is required.
Affected
- Google Android 17 (per the Android Security Bulletin table; verify on Google's page, as this was not confirmed there)
- Android build numbers: Unknown.
Fixed in
- Android Security Patch Level 2026-10-01 or later
- Google Play system update for the Telephonycore module (date may differ from the patch level)
Workaround
Unknown. No vendor workaround published; the fix is the security update.
Exploitation
- Not flagged as exploited in the Android Security Bulletin.
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
- No public proof of concept found; this is not an exhaustive search.
Our recommendation
- Confirm that all Android 17 devices show patch level 2026-10-01 or later and that the Google Play system update is current.
- Use MDM to enforce the update and report devices on older levels.
- Prioritise BYOD phones and devices with unpatched Android 17 builds.
- Check the vendor's rollout dates per device, as some manufacturers ship later.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Android Security Bulletin—October 2026 source.android.com
- Android 17 bulletin table entry (GitHub mirror) github.com
- CVE-2026-58859 aggregator entry cve.threatint.com
- CISA ADP Vulnrichment via HOL Guard hol.org
- Hexnode: Android October 2026 security update www.hexnode.com
- Canadian Cyber Centre: Android security advisory October 2026 www.cyber.gc.ca
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 2 Nov 2026, 06:24.
Original description (NVD)
In multiple places, there is a possible denial of service due to an uncaught exception. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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