Kernel memory disclosure via stale timeline pointer
Published Aug 10, 2026 · Updated Aug 10, 2026
Use-after-free in the Linux Xe GuC scheduler allows local users to disclose kernel memory through the DRM render node. Queue destruction frees q->name while scheduler fences retain it, so sync_file inspection copies data through a dangling timeline-name pointer. Exploitation requires low-privileged Intel Xe render-node access and yields repeatable kernel-heap disclosure or a machine crash; systems without Intel Xe are unaffected.
Summary
What happened
Use-after-free in the Linux Xe GuC scheduler allows local users to disclose kernel memory through the DRM render node. Queue destruction frees q->name while scheduler fences retain it, so sync_file inspection copies data through a dangling timeline-name pointer. Exploitation requires low-privileged Intel Xe render-node access and yields repeatable kernel-heap disclosure or a machine crash; systems without Intel Xe are unaffected.
The record
- CVE
- CVE-2026-68383
- Published
- Aug 10, 2026
- Updated
- Aug 10, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-825
- 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=6.12.43 <6.13
- Affected versionversion=6.15.11 <6.16
- Affected versionversion=6.16.2 <6.17
- Affected versionversion=6.17
- Affected versionversion=683b0e397dad9f26a42dcacf6f7f545a77ce6c06
- Affected versionversion=6bd90e700b4285e6a7541e00f969cab0d696adde <299bc6d50b1bed7d1f408391736712f01a0855e2
- Affected versionversion=6bd90e700b4285e6a7541e00f969cab0d696adde <77fd62412431e8c80ef2ad61466bc76fe425f80a
- Affected versionversion=b17fcce70733c211cb5dabf54f4f9491920b1d92
- Affected versionversion=ba37807d08bae67de6139346a85650cab5f6145a
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.
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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Your stack
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