Android: Remote denial of service via out-of-range exception in SIP address handling
Summary
A flaw in the CompareTelUris function in SipAddress.cpp, caused by an incorrect bounds check, can trigger an unhandled out-of-range exception and crash the process. A remote attacker can use this to cause a denial of service without extra privileges or user interaction. Confidentiality and integrity are not affected according to the supplied CVSS vector. The CVE record names the Android kernel as the affected component, which conflicts with the description, so the affected component is not fully confirmed.
Affected
- Google Android devices. Affected Android versions and component: unconfirmed (CVE record lists the Android kernel, description points to SIP address code).
- Affected builds before security patch level 2026-11-05.
Fixed in
- Security patch level 2026-11-05 or later (per Google's Pixel Update Bulletin, November 2026).
- The CVE was not found in the bulletin excerpts reviewed; coverage is based on Google's statement that this patch level addresses all issues in the bulletin.
- Fixed build numbers: Unknown.
Workaround
Unknown. No vendor workaround documented; patching is the only documented remedy.
Exploitation
- No evidence of exploitation in the wild found.
- No public proof of concept found.
- CISA SSVC assessment: Exploitation none, Automatable yes, Technical Impact partial.
- NVD status: Awaiting Analysis.
Our recommendation
- Verify that Android devices show security patch level 2026-11-05 or later (Settings > About phone > Android security update).
- Enforce the patch level through MDM and track Pixel and other Android devices separately.
- Treat as regular patching priority unless devices are in a high-risk environment.
- Check the CVE in the full Pixel bulletin table once available.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- CVE Record CVE-2026-59623 www.cve.org
- Pixel Update Bulletin November 2026 source.android.com
- Android Security Bulletin November 2026 source.android.com
- CVE-2026-59623 threat intelligence mirror cve.threatint.com
- Strix CVE-2026-59623 status www.strix.ai
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 11 Nov 2026, 04:53.
Original description (NVD)
In CompareTelUris of SipAddress.cpp, there is a possible way to trigger an unhandled out of range exception and process crash due to an incorrect bounds check. This could lead to remote denial of service 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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