Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2022-2586

linux

Linux Kernel Organization / linux · affected before 6.0-rc1

Watch CVE-2022-2586 Browse KEV feed
Severity
CVSS 5.3 · Medium
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
10.2%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2022-2586 is a vulnerability affecting Linux Kernel Organization linux. It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Linux Kernel Organization / linux affected before 6.0-rc1.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

linux

It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.

linux Affected
linux_kernel
Before 6.0-rc1
The Linux Kernel Organization Affected
linux linux
Before 4.14.316 Before 4.19.256 Before 5.4.211 Before 5.10.137 Before 5.15.61 Before 5.18.18 Before 5.19.2
View vendor advisory (opens in new tab)
Published
08 Jan 2024
Exploitation Reported
26 Jun 2024
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None

Tags

linux nessus_scanner cisa

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 26 Jun 2024

A trusted third party reported exploitation.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

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Source Added
CISA First 2024-06-26 00:00 UTC
CVE 2026-08-20 14:10 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nessus https://www.tenable.com/plugins/nessus/236648 02 Jun 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

5.3 Medium

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

10.2%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Use After Free CWE-416

Timeline

From disclosure to observed exploitation

  1. 14:10 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  2. 09:26 UTC

    Nessus plugin available

    Scanner coverage available

  3. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  4. 17:46 UTC

    CVE published

    Vulnerability disclosed publicly

  5. 22:01 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2022-2586

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2022-2586",
  "confidence": "Confirmed",
  "cvss_score": 5.3,
  "cvss_estimated": false,
  "epss_score": 0.10202,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}