CVE-2022-50213Known exploitationPublic exploit

Root escalation via cross-table SET_ID lookup

Published Jun 18, 2025 · Updated Aug 5, 2026

Use-after-free in Linux kernel 3.16 through 5.19.1 allows local users to gain root privileges through crafted nftables batches. nft_set_lookup_byid accepts a SET_ID for a set owned by another table, so deleting that table frees objects while references remain reachable from the second table. Exploitation requires CAP_NET_ADMIN, obtainable through enabled unprivileged user and network namespaces, and can also disclose kernel memory or crash the host.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel 3.16 through 5.19.1 allows local users to gain root privileges through crafted nftables batches. nft_set_lookup_byid accepts a SET_ID for a set owned by another table, so deleting that table frees objects while references remain reachable from the second table. Exploitation requires CAP_NET_ADMIN, obtainable through enabled unprivileged user and network namespaces, and can also disclose kernel memory or crash the host.

The record

CVE
CVE-2022-50213
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.16
  2. Affected versionversion=958bee14d0718ca7a5002c0f48a099d1d345812a <0d07039397527361850c554c192e749cfc879ea9
  3. Affected versionversion=958bee14d0718ca7a5002c0f48a099d1d345812a <1a4b18b1ff11ba26f9a852019d674fde9d1d1cff
  4. Affected versionversion=958bee14d0718ca7a5002c0f48a099d1d345812a <470ee20e069a6d05ae549f7d0ef2bdbcee6a81b2
  5. Affected versionversion=958bee14d0718ca7a5002c0f48a099d1d345812a <77d3b5038b7462318f5183e2ad704b01d57215a2
  6. Affected versionversion=958bee14d0718ca7a5002c0f48a099d1d345812a <f4fa03410f7c5f5bd8f90e9c11e9a8c4b526ff6f
  7. Affected versionversion=958bee14d0718ca7a5002c0f48a099d1d345812a <faafd9286f1355c76fe9ac3021c280297213330e
  8. Affected versionversion=958bee14d0718ca7a5002c0f48a099d1d345812a <fab2f61cc3b0e441b1749f017cfee75f9bbaded7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.16; version=958bee14d0718ca7a5002c0f48a099d1d345812a <0d07039397527361850c554c192e749cfc879ea9; version=958bee14d0718ca7a5002c0f48a099d1d345812a <1a4b18b1ff11ba26f9a852019d674fde9d1d1cff; version=958bee14d0718ca7a5002c0f48a099d1d345812a <470ee20e069a6d05ae549f7d0ef2bdbcee6a81b2; version=958bee14d0718ca7a5002c0f48a099d1d345812a <77d3b5038b7462318f5183e2ad704b01d57215a2; version=958bee14d0718ca7a5002c0f48a099d1d345812a <f4fa03410f7c5f5bd8f90e9c11e9a8c4b526ff6f; version=958bee14d0718ca7a5002c0f48a099d1d345812a <faafd9286f1355c76fe9ac3021c280297213330e; version=958bee14d0718ca7a5002c0f48a099d1d345812a <fab2f61cc3b0e441b1749f017cfee75f9bbaded7

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux Kernel CVE TeamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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