Debian/linux: medium 5.5
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
Action: Upgrade linux to 4.19.9-1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 4.19.9-1 | - |
Fixed versions
| 4.19.9-1 |
Sources
- osv: DEBIAN-CVE-2018-18397#Debian:14/linux
- https://security-tracker.debian.org/tracker/CVE-2018-18397
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