Name | CVE-2018-18397 |
Description | The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c. |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
linux (PTS) | bullseye (security), bullseye | 5.10.223-1 | fixed |
bookworm | 6.1.106-3 | fixed | |
bookworm (security) | 6.1.112-1 | fixed | |
trixie | 6.10.11-1 | fixed | |
sid | 6.10.12-1 | fixed |
The information below is based on the following data on fixed versions.
Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
---|---|---|---|---|---|---|
linux | source | jessie | (not affected) | |||
linux | source | stretch | (not affected) | |||
linux | source | (unstable) | 4.19.9-1 |
[stretch] - linux <not-affected> (Vulnerable code not present)
[jessie] - linux <not-affected> (Vulnerable code not present)
https://lore.kernel.org/lkml/20181126173452.26955-1-aarcange@redhat.com/T/#u
https://bugs.chromium.org/p/project-zero/issues/detail?id=1700