Kernel memory exhaustion via failed NVMe mapping
Published Jul 19, 2026 · Updated Jul 19, 2026
Resource leak in Linux Kernel 6.18 through 6.18.33 and 7.0 through 7.0.10 allows local users to exhaust memory via NVMe ioctls. In nvme_map_user_request, the integrity-mapping error path checks a local bio pointer that remains NULL instead of unmapping req->bio, retaining the mapped allocation. Exploitation requires permission to issue a metadata-bearing NVMe ioctl and induce an integrity-mapping failure repeatedly; the bounded consequence is local service interruption from memory exhaustion.
Summary
What happened
Resource leak in Linux Kernel 6.18 through 6.18.33 and 7.0 through 7.0.10 allows local users to exhaust memory via NVMe ioctls. In nvme_map_user_request, the integrity-mapping error path checks a local bio pointer that remains NULL instead of unmapping req->bio, retaining the mapped allocation. Exploitation requires permission to issue a metadata-bearing NVMe ioctl and induce an integrity-mapping failure repeatedly; the bounded consequence is local service interruption from memory exhaustion.
The record
- CVE
- CVE-2026-64072
- Published
- Jul 19, 2026
- Updated
- Jul 19, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499.001
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 19, 2026CVE publishedPublication date reported by the CVE source.
- Jul 19, 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=6.18
- Affected versionversion=d0d1d522316e91f2b935a78bbf962b8e529d8c4f <2279cd9c61a330e5de4d6eb0bc422820dd6fdf36
- Affected versionversion=d0d1d522316e91f2b935a78bbf962b8e529d8c4f <51ec7fc4e10c5e332bf4007bdb7e4c6bf03c14c9
- Affected versionversion=d0d1d522316e91f2b935a78bbf962b8e529d8c4f <fea4b46f84c50caf93c6c0f2a54b1be2edfb4491
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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