| Name | CVE-2021-3847 |
| Description | An unauthorized access to the execution of the setuid file with capabilities flaw in the Linux kernel OverlayFS subsystem was found in the way user copying a capable file from a nosuid mount into another mount. A local user could use this flaw to escalate their privileges on the system. |
| 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) | bullseye | 5.10.218-1 | vulnerable |
| bullseye (security) | 5.10.221-1 | vulnerable |
| bookworm | 6.1.94-1 | vulnerable |
| bookworm (security) | 6.1.99-1 | vulnerable |
| trixie | 6.9.10-1 | vulnerable |
| sid | 6.9.11-1 | 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) | | | |
Notes
https://bugzilla.redhat.com/show_bug.cgi?id=2009704
https://www.openwall.com/lists/oss-security/2021/10/14/3