Kernel memory corruption via orphaned async notifier
Published Sep 11, 2026 · Updated Sep 11, 2026
Use-after-free in the IPU7 ISYS driver in Linux 6.17 allows attackers to corrupt kernel notifier-list state during a failed device probe. On the isys_probe() error path, isys_unregister_devices() frees the enclosing ipu7_isys object without unregistering the notifier added by isys_notifier_init(), leaving a stale entry in the global notifier_list. The condition requires a later probe step to fail and the notifier list to be walked again; the public record identifies list corruption and use-after-free but no attacker-controlled trigger or additional impact.
Summary
What happened
Use-after-free in the IPU7 ISYS driver in Linux 6.17 allows attackers to corrupt kernel notifier-list state during a failed device probe. On the isys_probe() error path, isys_unregister_devices() frees the enclosing ipu7_isys object without unregistering the notifier added by isys_notifier_init(), leaving a stale entry in the global notifier_list. The condition requires a later probe step to fail and the notifier list to be walked again; the public record identifies list corruption and use-after-free but no attacker-controlled trigger or additional impact.
The record
- CVE
- CVE-2026-89522
- Published
- Sep 11, 2026
- Updated
- Sep 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 11, 2026CVE publishedPublication date reported by the CVE source.
- Sep 11, 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=6.17
- Affected versionversion=a516d36bdc3d8373f904af57c95e76d6f921cf1c <2a8dd9fd12f3f6b21207cec8f50c92cd428e6b81
- Affected versionversion=a516d36bdc3d8373f904af57c95e76d6f921cf1c <323c411fb63122e8cef5b833032d69d59a838559
- Affected versionversion=a516d36bdc3d8373f904af57c95e76d6f921cf1c <d7f48aa7d60c65d3e6d5312c27f17d5525a245fb
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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