| Name | CVE-2021-3714 |
| Description | A flaw was found in the Linux kernels memory deduplication mechanism. Previous work has shown that memory deduplication can be attacked via a local exploitation mechanism. The same technique can be used if an attacker can upload page sized files and detect the change in access time from a networked service to determine if the page has been merged. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| linux (PTS) | buster | 4.19.249-2 | vulnerable |
| buster (security) | 4.19.289-2 | vulnerable |
| bullseye | 5.10.197-1 | vulnerable |
| bullseye (security) | 5.10.191-1 | vulnerable |
| bookworm | 6.1.55-1 | vulnerable |
| bookworm (security) | 6.1.52-1 | vulnerable |
| trixie | 6.5.10-1 | vulnerable |
| sid | 6.5.13-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| linux | source | (unstable) | (unfixed) | unimportant | | |
Notes
https://bugzilla.redhat.com/show_bug.cgi?id=1931327
Inherent design limitation, can be avoided by not using KSM