Field Assessment
AI analysis pending.
Exhibit — Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
External Security References
Note: these links are listed for security research and verification purposes only.
CVE
CVE-2018-18281
Severity
HIGH
CVSS
7.8
EPSS
1.06%
Linux
Original Filing — NVD Description
Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.