🛡️ CVE-2022-50212 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

netfilter: nf_tables: do not allow CHAIN_ID to refer to another table

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: do not allow CHAIN_ID to refer to another table

When doing lookups for chains on the same batch by using its ID, a chain

from a different table can be used. If a rule is added to a table but

refers to a chain in a different table, it will be linked to the chain in

table2, but would have expressions referring to objects in table1.

Then, when table1 is removed, the rule will not be removed as its linked to

a chain in table2. When expressions in the rule are processed or removed,

that will lead to a use-after-free.

When looking for chains by ID, use the table that was used for the lookup

by name, and only return chains belonging to that same table.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

CVE-2022-50212 is recorded against 2 packages.

  • kernel (from 5.19.0 up to 5.19.2)
  • linux-kernel (from 5.19 up to 5.19.2)

Timeline and source

Published on 18 June 2025 and last revised on 6 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2022-50212 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-06-18
Updated 2026-08-12
Modified 2026-08-06

Affected Packages

Software From version Fixed in
kernel 5.19.0 5.19.2
linux-kernel 5.19 5.19.2

Similar Threats

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