Local privilege escalation via deferred trigger teardown
Published Aug 10, 2026 · Updated Aug 10, 2026
Use-after-free in Linux kernel tracing from 6.19 allows local users with tracefs write access to corrupt kernel memory during trigger removal. Trigger free callbacks release hist_data, cmd_ops, or enable_data before the deferred tracepoint grace period ends, leaving concurrent handlers to access reclaimed objects. Successful heap reclamation can disclose kernel memory, grant elevated privileges, or crash the system.
Summary
What happened
Use-after-free in Linux kernel tracing from 6.19 allows local users with tracefs write access to corrupt kernel memory during trigger removal. Trigger free callbacks release hist_data, cmd_ops, or enable_data before the deferred tracepoint grace period ends, leaving concurrent handlers to access reclaimed objects. Successful heap reclamation can disclose kernel memory, grant elevated privileges, or crash the system.
The record
- CVE
- CVE-2026-68283
- Published
- Aug 10, 2026
- Updated
- Aug 10, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 10, 2026CVE publishedPublication date reported by the CVE source.
- Aug 10, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.19
- Affected versionversion=61d445af0a7c70018111919e47beaaee15653f2f <79097812153b826fc156a2930ec8a90ed9edf4a2
- Affected versionversion=61d445af0a7c70018111919e47beaaee15653f2f <b9c8a1400a3bf633f32820d184f3e05fed0f4af7
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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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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