Local service interruption via hugetlb VMA lock leak
Published Jun 9, 2026 · Updated Jun 9, 2026
Resource leak in Linux Kernel 6.19 allows local users to interrupt service by triggering failed hugetlb VMA lock allocation. The mmap_prepare path allocates a hugetlb VMA lock, but a later allocation failure leaves that lock unreleased. Low-privilege local access is required; the leak affects availability without reported data disclosure or modification.
Summary
What happened
Resource leak in Linux Kernel 6.19 allows local users to interrupt service by triggering failed hugetlb VMA lock allocation. The mmap_prepare path allocates a hugetlb VMA lock, but a later allocation failure leaves that lock unreleased. Low-privilege local access is required; the leak affects availability without reported data disclosure or modification.
The record
- CVE
- CVE-2026-46318
- Published
- Jun 9, 2026
- Updated
- Jun 9, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 9, 2026CVE publishedPublication date reported by the CVE source.
- Jun 9, 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=6.19
- Affected versionversion=ea52cb24cd3fb121283754ab82b2cb3044609359 <3af5fc3f0ac98c624c109c8c0796fa46e814344c
- Affected versionversion=ea52cb24cd3fb121283754ab82b2cb3044609359 <83f9efcce93f8574be2279090ee2aec58b86cda7
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
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Technologies
Your stack
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Your stack
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