CVE-2022-3328Public exploit

Local privilege escalation via private-directory rename race

Published Jan 8, 2024 · Updated Jun 3, 2025

Race condition in snap-confine in Canonical snapd before 2.61.1 allows local users to escalate privileges via private /tmp setup. must_mkdir_and_open_with_perms validates an opened directory but later renames its pathname and retries creation, allowing concurrent invocations to replace the scratch directory. Local low-privileged access is required; full root code execution was demonstrated by chaining two multipathd flaws to bypass AppArmor.

CVSS severity7.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in snap-confine in Canonical snapd before 2.61.1 allows local users to escalate privileges via private /tmp setup. must_mkdir_and_open_with_perms validates an opened directory but later renames its pathname and retries creation, allowing concurrent invocations to replace the scratch directory. Local low-privileged access is required; full root code execution was demonstrated by chaining two multipathd flaws to bypass AppArmor.

The record

CVE
CVE-2022-3328
Published
Jan 8, 2024
Updated
Jun 3, 2025
Vendor
Canonical
Product
snapd
Classifications
CWE-362, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.61.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Canonical · snapdversion=0 <2.61.1

Published CVSS scores

7.8CanonicalCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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