Vulnerability Analysis
CVE-2021-3493
The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on files in an underlying file system. Due to the combination of unprivileged user namespaces along with a patch carried in the Ubuntu kernel to allow unprivileged overlay mounts, an attacker could use this to gain elevated privileges.
CISA KEV
CVSS Base Score
8.8
HIGH
Exploitability:2.1
Impact Score:6.1
Temporal Score:-
EPSS:43.99%
Threat Intelligence Signals
CISA KEV
YES
KEV Date Added
2022-10-20
Ransomware Use
Unknown
KEV Due Date
2022-11-10
VulnCheck In-the-Wild
No
Nuclei Template
No
EPSS Score
43.988%
EPSS Percentile
98.6th pct
GHSA ID
GitHub Severity
HIGH
SSVC Exploitation
—
SSVC Automatable
—
Vulnerability Class
—
Identity & Timeline
| Status | - |
| Assigning Authority | - |
| CVSS Version / Source | - |
| Reserved | - |
| Published | - |
| Patch Date (date_public) | - |
| Exploit DB Date | - |
| First GitHub PoC Date | - |
| Last Updated | - |
| Time to Patch (Days to fix) | - |
| Exploit Release Gap | - |
| PoC Release Gap | - |
| Exploit DB References | None identified |
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| No affected products specified. | ||
Social Buzz