Vulnerabilities

CVSS

7.8 High

Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Risk score

62.4

Published

2022-02-17

Status

Published

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

Weaknesses

CWE-362

Coverage 1

vulnerability

Ubuntu snap-confine Flaw Could Give Local Users Root on Default Desktop Installs

A critical vulnerability (CVE-2026-8933, CVSS 7.8) has been discovered in snap-confine within Ubuntu Desktop installations. An unprivileged user can exploit a race condition to gain root access and full control of the sy…

The Hacker News · Jul 22, 2026 High

CVE-2026-8933CVE-2021-44731CVE-2022-3328local privilege escalationrace conditionubuntu

All articles mentioning it

Advisories and references

• ubuntu.com/security/notices/USN-5292-1
• openwall.com/lists/oss-security/2022/02/18/2
• lists.fedoraproject.org/archives/list/package-announce%40lists.fedor...
• lists.fedoraproject.org/archives/list/package-announce%40lists.fedor...
• debian.org/security/2022/dsa-5080
• openwall.com/lists/oss-security/2022/02/23/1
• openwall.com/lists/oss-security/2022/02/23/2
• openwall.com/lists/oss-security/2022/11/30/2
• seclists.org/fulldisclosure/2022/Dec/4
• packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_ope...