Sandbox-external memory disclosure via unchecked size addition
Published Sep 29, 2026 · Updated Sep 29, 2026
Integer overflow in Metrics in Google Chrome before 154.0.8037.57 lets remote attackers with renderer control read memory outside the sandbox. FieldTrialList::GetParamsFromSharedMemory adds a shared-memory pickle_size to a FieldTrialEntry size without checked arithmetic, allowing a large value to wrap the bounds calculation and trigger an out-of-bounds read. Exploitation requires a crafted HTML page and prior compromise of the renderer process; the reported consequence is memory disclosure.
Summary
What happened
Integer overflow in Metrics in Google Chrome before 154.0.8037.57 lets remote attackers with renderer control read memory outside the sandbox. FieldTrialList::GetParamsFromSharedMemory adds a shared-memory pickle_size to a FieldTrialEntry size without checked arithmetic, allowing a large value to wrap the bounds calculation and trigger an out-of-bounds read. Exploitation requires a crafted HTML page and prior compromise of the renderer process; the reported consequence is memory disclosure.
The record
- CVE
- CVE-2026-95308
- Published
- Sep 29, 2026
- Updated
- Sep 29, 2026
- Vendor
- WebM Project
- Product
- Google Chrome
- Classifications
- CWE-190
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 29, 2026CVE publishedPublication date reported by the CVE source.
- Sep 29, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=154.0.8037.57 <154.0.8037.57
What conditions does exploitation require?
What is affected?
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.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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