CVE-2026-3888 (GCVE-0-2026-3888)
Vulnerability from cvelistv5 – Published: 2026-03-17 14:02 – Updated: 2026-03-18 08:59
VLAI
EPSS
VEX
Title
Local Privilege Escalation in snapd
Summary
Local privilege escalation in snapd on Linux allows local attackers to get root privilege by re-creating snap's private /tmp directory when systemd-tmpfiles is configured to automatically clean up this directory. This issue affects Ubuntu 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 24.04 LTS.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-17 00:00 UTC
CWE
- CWE-268 - Privilege chaining
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-3888 | vdb-entryissue-tracking |
| https://ubuntu.com/security/notices/USN-8102-1 | vendor-advisory |
| https://discourse.ubuntu.com/t/snapd-local-privil… | technical-descriptionvendor-advisory |
| https://blog.qualys.com/vulnerabilities-threat-re… | technical-descriptionmedia-coverage |
| https://cdn2.qualys.com/advisory/2026/03/17/snap-… | technical-descriptionmedia-coverage |
| http://www.openwall.com/lists/oss-security/2026/03/18/1 |
Impacted products
6 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
|
Affected:
0 , < 2.75.1
(semver)
|
||||
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
2.61.4ubuntu0.16.04.1+esm2 , < *
(dpkg)
|
guessed | |
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
2.61.4ubuntu0.18.04.1+esm2 , < *
(dpkg)
|
guessed | |
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
2.67.1+20.04ubuntu1~esm1 , < *
(dpkg)
|
guessed | |
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
2.73+ubuntu22.04.1 , < *
(dpkg)
|
guessed | |
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
2.73+ubuntu24.04.2 , < *
(dpkg)
|
guessed |
Date Public
2026-03-17 14:00
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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