CVE-2014-5206
High
Description
The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a "mount -o remount" command within a user namespace.
SeverityHigh
CVSS7.2
Exploit probability—
Product
Linux Kernel
PublishedAug 18, 2014
First seenAug 18, 2014
How to fix
Update
- linux linux_kernel3.10.55, 3.12.27, 3.14.19, 3.16.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.8 ≤ v < 3.10.55, 3.11 ≤ v < 3.12.27, 3.13 ≤ v < 3.14.19, 3.15 ≤ v < 3.16.3 | 3.10.55, 3.12.27, 3.14.19, 3.16.3 |
| canonical ubuntu_linux | 12.04, 14.04 | — |
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