Tracker / CVE-2018-18281
CVE-2018-18281
High 7.8
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.
Affected products and versions
| canonical | ubuntu_linux |
|---|---|
| debian | debian_linux |
| linux | linux_kernel · 3.2 → 4.9.135 |
| linux | linux_kernel · 4.14.79 → 4.18.16 |
| linux | linux_kernel · 4.18.17 → 4.19 |
| linux | linux_kernel · 4.9.136 → 4.14.78 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.