CVE-2022-50223

Runtime warning via NR_CPUS iteration

Published Jun 18, 2025 · Updated Aug 15, 2026

Improper CPU iteration in the Linux kernel 5.19 through 5.19.1 allows local users to trigger a warning via /proc/cpuinfo. LoongArch show_cpuinfo iterates to compile-time NR_CPUS rather than runtime nr_cpu_ids, passing out-of-range CPU indexes to cpumask checks. The issue requires CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS; published evidence shows a warning trace, not a crash or data compromise.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper CPU iteration in the Linux kernel 5.19 through 5.19.1 allows local users to trigger a warning via /proc/cpuinfo. LoongArch show_cpuinfo iterates to compile-time NR_CPUS rather than runtime nr_cpu_ids, passing out-of-range CPU indexes to cpumask checks. The issue requires CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS; published evidence shows a warning trace, not a crash or data compromise.

The record

CVE
CVE-2022-50223
Published
Jun 18, 2025
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=5.19
  2. Affected versionversion=7153c3cbb5b9b99755659b97861fd4fc909ed86f <28e112afa44ad0814120d41c68fa72372a2cd2c2
  3. Affected versionversion=7153c3cbb5b9b99755659b97861fd4fc909ed86f <37268c7badd36f5381056d1651a6ee0b63b8ff3c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=7153c3cbb5b9b99755659b97861fd4fc909ed86f <28e112afa44ad0814120d41c68fa72372a2cd2c2; version=7153c3cbb5b9b99755659b97861fd4fc909ed86f <37268c7badd36f5381056d1651a6ee0b63b8ff3c

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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