CVE-2022-50210

Kernel warning via out-of-range CPU iteration

Published Jun 18, 2025 · Updated May 11, 2026

Improper CPU-mask iteration in the Linux kernel allows local users to trigger a runtime warning by reading /proc/cpuinfo. The MIPS show_cpuinfo path iterates with the compile-time NR_CPUS limit, so cpu_max_bits_warn() receives CPU indices beyond the runtime nr_cpu_ids limit. The path is exposed only when CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS are enabled; the documented consequence is a kernel warning and associated log output.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper CPU-mask iteration in the Linux kernel allows local users to trigger a runtime warning by reading /proc/cpuinfo. The MIPS show_cpuinfo path iterates with the compile-time NR_CPUS limit, so cpu_max_bits_warn() receives CPU indices beyond the runtime nr_cpu_ids limit. The path is exposed only when CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS are enabled; the documented consequence is a kernel warning and associated log output.

The record

CVE
CVE-2022-50210
Published
Jun 18, 2025
Updated
May 11, 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. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=2.6.29
  2. Affected versionversion=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <274e44e2123417e0924c90d4b4531913b5f3aa2e
  3. Affected versionversion=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <4cb392956ae392aec4aa06e661a0bb9146b0bace
  4. Affected versionversion=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <7d305823e02217b29d41fca67e3cef87fd7bd688
  5. Affected versionversion=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <807adf6ffa8c3beedcd63b20f5a59c7d061df7d2
  6. Affected versionversion=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <8916ec149c79cb21f5454fa7840ad96f99cf51cf
  7. Affected versionversion=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <98aaa511957667ba26d6dabe28dfa210a8f53a63
  8. Affected versionversion=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <d3ac4e47510ec0753ebe1e418a334ad202784aa8
  9. Affected versionversion=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <e1a534f5d074db45ae5cbac41d8912b98e96a006
  10. Affected versionversion=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <e41db8a9ce696a3382a4f098878fd4d14bccd201

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.29; version=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <274e44e2123417e0924c90d4b4531913b5f3aa2e; version=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <4cb392956ae392aec4aa06e661a0bb9146b0bace; version=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <7d305823e02217b29d41fca67e3cef87fd7bd688; version=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <807adf6ffa8c3beedcd63b20f5a59c7d061df7d2; version=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <8916ec149c79cb21f5454fa7840ad96f99cf51cf; version=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <98aaa511957667ba26d6dabe28dfa210a8f53a63; version=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <d3ac4e47510ec0753ebe1e418a334ad202784aa8; version=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <e1a534f5d074db45ae5cbac41d8912b98e96a006; version=ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 <e41db8a9ce696a3382a4f098878fd4d14bccd201

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo