---
title: "CVE-2022-2586: Linux Kernel Use-After-Free Vulnerability"
url: https://erroneo.us/security/cve/CVE-2022-2586/
description: "CVE-2022-2586 (Linux Kernel): Exploited in the wild (CISA KEV). It was discovered that a nft object or expression could reference a nft set on a different…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-01-08
date_modified: 2026-10-14
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2022-2586"
kev: true
cvss: 5.3
epss: 0.10202
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2022-2586: Linux Kernel Use-After-Free Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Linux Kernel. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-06-26, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-07-17 ; treat that as the outer limit, not the target.
- EPSS 10.2% , percentile 96: FIRST’s model estimates a 10.2% chance of exploitation activity in the next 30 days, higher than 96% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.

## What it is

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.

## Affected products (CVE record)

- The Linux Kernel Organization linux: 3.16 < 4.14.316, 4.15 < 4.19.256, 4.20 < 5.4.211, 5.5 < 5.10.137, 5.11 < 5.15.61, 5.16 < 5.18.18, 5.19 < 5.19.2

## Severity

- canonical CVSS 3.1: 5.3 `CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H`

## Exploitation

- CISA KEV: added 2024-06-26; federal due date 2024-07-17. Known ransomware use: Unknown.
- CISA required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 10.20% probability of exploitation activity in the next 30 days; percentile 96.

## Sources

- [Listed in CISA KEV notes (seclists.org)](https://seclists.org/oss-sec/2022/q3/131)
- [CVE.org record CVE-2022-2586](https://www.cve.org/CVERecord?id=CVE-2022-2586)
- [NVD entry CVE-2022-2586](https://nvd.nist.gov/vuln/detail/CVE-2022-2586)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-2586)
- [ubuntu.com](https://ubuntu.com/security/notices/USN-5564-1)
- [ubuntu.com](https://ubuntu.com/security/notices/USN-5560-2)
- [ubuntu.com](https://ubuntu.com/security/notices/USN-5582-1)
- [ubuntu.com](https://ubuntu.com/security/notices/USN-5567-1)
- [ubuntu.com](https://ubuntu.com/security/notices/USN-5560-1)
- [ubuntu.com](https://ubuntu.com/security/notices/USN-5566-1)
- [openwall.com](https://www.openwall.com/lists/oss-security/2022/08/09/5)
- [ubuntu.com](https://ubuntu.com/security/notices/USN-5565-1)
- [zerodayinitiative.com](https://www.zerodayinitiative.com/advisories/ZDI-22-1118/)
- [lore.kernel.org](https://lore.kernel.org/netfilter-devel/20220809170148.164591-1-cascardo@canonical.com/T/#t)
- [ubuntu.com](https://ubuntu.com/security/notices/USN-5562-1)
- [ubuntu.com](https://ubuntu.com/security/notices/USN-5557-1)
- [cve.mitre.org](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2586)
- [vicarius.io](https://www.vicarius.io/vsociety/posts/use-after-free-vulnerability-linked-chain-between-nft-tables-cve-2022-2586)
- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/html/ssa-794697.html)
- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/html/ssa-806742.html)

---
Source page: https://erroneo.us/security/cve/CVE-2022-2586/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt