Kernel memory corruption via unsynchronized delayed work
Published Oct 18, 2025 · Updated Oct 18, 2025
Use-after-free in the Linux mvsas driver allows local users to access freed kernel memory during Marvell SAS/SATA controller removal. In mvs_free(), cancel_delayed_work() can return while mwq->work_q is running, so mvs_info is freed before mvs_work_queue() finishes using it. The defect requires the delayed-work callback to overlap controller detachment; the public record establishes neither code execution nor repeatable exploitation.
Summary
What happened
Use-after-free in the Linux mvsas driver allows local users to access freed kernel memory during Marvell SAS/SATA controller removal. In mvs_free(), cancel_delayed_work() can return while mwq->work_q is running, so mvs_info is freed before mvs_work_queue() finishes using it. The defect requires the delayed-work callback to overlap controller detachment; the public record establishes neither code execution nor repeatable exploitation.
The record
- CVE
- CVE-2025-40001
- Published
- Oct 18, 2025
- Updated
- Oct 18, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 18, 2025CVE publishedPublication date reported by the CVE source.
- Oct 18, 2025Record 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=20b09c2992fefbe78f8cede7b404fb143a413c52 <60cd16a3b7439ccb699d0bf533799eeb894fd217
- Affected versionversion=2.6.31
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
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Public exploit references
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Technologies
Your stack
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Your stack
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