VULNERABILITY INTELLIGENCE
CVE-2018-18281
CVSS score7.8 HIGH
EPSS probability1.10%
CISA KEVNot currently listed
Published2018-10-30
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
Weakness classification
- CWE-459: Incomplete Cleanup
Primary references
- cve@mitre.org — Patch, Third Party Advisory, VDB Entry
- cve@mitre.org — Mailing List, Patch, Third Party Advisory
- cve@mitre.org — Third Party Advisory, VDB Entry
- cve@mitre.org — Third Party Advisory, VDB Entry
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org — Exploit, Patch, Third Party Advisory