UIProcess crash via unchecked inspector frame lengths
Published Nov 25, 2025 · Updated Jun 29, 2026
Out-of-bounds read in WebKitGTK before 2.50.2 allows remote attackers to crash the UIProcess through the GLib inspector server. WTF::SocketConnection::readMessage() applies strlen() to peer-controlled framed data without limiting the scan to bodySize, then subtracts an unchecked message-name length and can underflow parametersSize. Exploitation requires the default-disabled remote inspector to be enabled and network-reachable; the reported consequence is a UIProcess crash.
Summary
What happened
Out-of-bounds read in WebKitGTK before 2.50.2 allows remote attackers to crash the UIProcess through the GLib inspector server. WTF::SocketConnection::readMessage() applies strlen() to peer-controlled framed data without limiting the scan to bodySize, then subtracts an unchecked message-name length and can underflow parametersSize. Exploitation requires the default-disabled remote inspector to be enabled and network-reachable; the reported consequence is a UIProcess crash.
The record
- CVE
- CVE-2025-13502
- Published
- Nov 25, 2025
- Updated
- Jun 29, 2026
- Vendor
- The WebKitGTK Team
- Product
- WebKitGTK
- Classifications
- CWE-125, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 25, 2025CVE publishedPublication date reported by the CVE source.
- Jun 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=0 <2.50.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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