Kernel use-after-free via preempt-fence lifetime race
Published Sep 13, 2024 · Updated Aug 5, 2026
Use-after-free in Linux kernel drm/xe 6.8 through 6.10.7 allows local users to access freed memory via a preempt-fence race. The preempt fence uses a lock owned by its execution queue, but signaling drops the queue reference before deferred waiters wake and acquire that lock. Triggering requires local low-privileged access and an active Xe graphics path; successful exploitation reaches freed kernel memory.
Summary
What happened
Use-after-free in Linux kernel drm/xe 6.8 through 6.10.7 allows local users to access freed memory via a preempt-fence race. The preempt fence uses a lock owned by its execution queue, but signaling drops the queue reference before deferred waiters wake and acquire that lock. Triggering requires local low-privileged access and an active Xe graphics path; successful exploitation reaches freed kernel memory.
The record
- CVE
- CVE-2024-46683
- Published
- Sep 13, 2024
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 13, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 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=6.8
- Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <10081b0b0ed201f53e24bd92deb2e0f3c3e713d4
- Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <730b72480e29f63fd644f5fa57c9d46109428953
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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