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Review reviewHigh

CVE-2022-50212

Linux Linux, linux kernel

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-a...

CVSS
7.8
EPSS
0.19%
9.18% percentile
CISA KEV
Not listed
Published
2025.06.18
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.19%
Technical severityCVSS 7.8

Vulnerability overview

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-a...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 837830a4b439bfeb86c70b0115c280377c84714b < 9e7dcb88ec8e85e4a8ad0ea494ea2f90f32d2583, >= 837830a4b439bfeb86c70b0115c280377c84714b < 91501513016903077f91033fa5d2aa26cac399b2, >= 837830a4b439bfeb86c70b0115c280377c84714b < 0f49613a213d918af790c1276f79da741968de11, >= 837830a4b439bfeb86c70b0115c280377c84714b < 58e863f64ee3d0879297e5e53b646e4b91e59620, >= 837830a4b439bfeb86c70b0115c280377c84714b < 95f466d22364a33d183509629d0879885b4f547e, >= 5.9, >= 5.9 < 5.10.137, >= 5.11 < 5.15.61, >= 5.16 < 5.18.18, >= 5.19 < 5.19.2
Fixed versions
5.10.137, 5.15.61, 5.18.18, 5.19.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416