CVE-2021-44731
High
Description
A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap's private mount namespace and causing snap-confine to execute arbitrary code and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1
SeverityHigh
CVSS7.8
Exploit probability—
Product
Canonical Snapd
PublishedFeb 17, 2022
First seenFeb 17, 2022
Weakness typeCWE-362Race condition
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| canonical snapd | v ≤ 2.54.2 | — |
| canonical ubuntu_linux | 18.04, 20.04, 21.10 | — |
| fedoraproject fedora | 34, 35 | — |
| debian debian_linux | 10.0, 11.0 | — |
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