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CVE-2018-1000200
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CVE-2018-1000200
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
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Execution
Exfiltration
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Initial Access
Lateral Movement
Persistence
Privilege Escalation
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Description
The Linux Kernel versions 4.14, 4.15, and 4.16 has a null pointer dereference which can result in an out of memory (OOM) killing of large mlocked processes. The issue arises from an oom killed process’s final thread calling exit_mmap(), which calls munlock_vma_pages_all() for mlocked vmas.This can happen synchronously with the oom reaper’s unmap_page_range() since the vma’s VM_LOCKED bit is cleared before munlocking (to determine if any other vmas share the memory and are mlocked).
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