Unrecoverable hang via misclassified EFI page faults
Published Jun 8, 2026 · Updated Jun 8, 2026
Denial of service in Linux Kernel 6.15 through 6.18.29 and 6.19 through 7.0.6 allows local users to cause an unrecoverable hang. During EFI runtime calls, fpregs_lock() sets SOFTIRQ_OFFSET, causing efi_crash_gracefully_on_page_fault() to mistake task-context faults for interrupt-context faults and leave them unhandled. Exploitation requires an x86 system whose faulty EFI firmware raises a page fault during a runtime service call; the resulting panic hard-freezes the host.
Summary
What happened
Denial of service in Linux Kernel 6.15 through 6.18.29 and 6.19 through 7.0.6 allows local users to cause an unrecoverable hang. During EFI runtime calls, fpregs_lock() sets SOFTIRQ_OFFSET, causing efi_crash_gracefully_on_page_fault() to mistake task-context faults for interrupt-context faults and leave them unhandled. Exploitation requires an x86 system whose faulty EFI firmware raises a page fault during a runtime service call; the resulting panic hard-freezes the host.
The record
- CVE
- CVE-2026-46290
- Published
- Jun 8, 2026
- Updated
- Jun 8, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 8, 2026CVE publishedPublication date reported by the CVE source.
- Jun 8, 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?
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- Affected versionversion=6.15
- Affected versionversion=d02198550423a0b695e7a24ec77153209ad45b09 <088f65e206087bf903743bd18417261d7a4c9644
- Affected versionversion=d02198550423a0b695e7a24ec77153209ad45b09 <22b365ba1af3d8c6036b8e5112fffe80998b85a0
- Affected versionversion=d02198550423a0b695e7a24ec77153209ad45b09 <db155b86d1523e85941f61efd7d7ffb594cc9a29
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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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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