CVE-2021-3493CISA KEVEPSS p98.6%

CVE-2021-3493Linux Kernel Privilege Escalation Vulnerability

Linux / Kernel

Description

The overlayfs stacking file system in Linux kernel does not properly validate the application of file capabilities against user namespaces, which could lead to privilege escalation.

Scoring

EPSS43.99% probability of exploitation · percentile 98.6% · 2026-06-18T12:00:27Z

CISA KEV entry

Added to KEV: 2022-10-20

(incoming)1

TypeTargetConfidenceTier
KEVEntryLinux Kernel Privilege Escalation Vulnerabilitykev-cve-2021-34930%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.