CVE-2022-42432

Kernel stack disclosure via false fingerprint match

Published Mar 29, 2023 · Updated Feb 14, 2025

Information disclosure in nftables in the Linux Kernel 6.0-rc2 allows local users to read stale kernel stack data via OS fingerprinting. nf_osf_find returns success after a fingerprint mismatch, causing nft_osf_eval to copy uninitialized OS fingerprint fields to userspace. Exploitation requires high-privileged code execution and exposes kernel memory that can support a separate kernel-code-execution chain.

CVSS severity5.1
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in nftables in the Linux Kernel 6.0-rc2 allows local users to read stale kernel stack data via OS fingerprinting. nf_osf_find returns success after a fingerprint mismatch, causing nft_osf_eval to copy uninitialized OS fingerprint fields to userspace. Exploitation requires high-privileged code execution and exposes kernel memory that can support a separate kernel-code-execution chain.

The record

CVE
CVE-2022-42432
Published
Mar 29, 2023
Updated
Feb 14, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-457, T1005
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 2025Record 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=6.0-rc2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.0-rc2

Published CVSS scores

5.1Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-457Use of Uninitialized Variable
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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