Permanent service interruption via oversized Zen-rule parcels
Published Sep 4, 2025 · Updated Sep 4, 2025
Resource exhaustion in Zen mode parceling in Google Android 13 through 15 allows local users to cause a permanent service interruption. The notification framework serializes complete ZenModeConfig and AutomaticZenRule data directly into Binder parcels instead of chunking lists and using compact string encoding, allowing oversized rule data to exhaust parcel resources. Local access is required, but no additional execution privileges or user interaction is needed; the resulting denial of service persists beyond the triggering call.
Summary
What happened
Resource exhaustion in Zen mode parceling in Google Android 13 through 15 allows local users to cause a permanent service interruption. The notification framework serializes complete ZenModeConfig and AutomaticZenRule data directly into Binder parcels instead of chunking lists and using compact string encoding, allowing oversized rule data to exhaust parcel resources. Local access is required, but no additional execution privileges or user interaction is needed; the resulting denial of service persists beyond the triggering call.
The record
- CVE
- CVE-2025-26449
- Published
- Sep 4, 2025
- Updated
- Sep 4, 2025
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-400, T1642
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 4, 2025CVE publishedPublication date reported by the CVE source.
- Sep 4, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=13
- Affected versionversion=14
- Affected versionversion=15
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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