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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2018-10-30T18:00:00

Updated: 2024-08-05T11:08:21.376Z

Reserved: 2018-10-12T00:00:00

Link: CVE-2018-18281

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-10-30T18:29:00.737

Modified: 2020-08-24T17:37:01.140

Link: CVE-2018-18281

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-10-18T00:00:00Z

Links: CVE-2018-18281 - Bugzilla