CVE-2022-50299

Kernel warning via md length wraparound

Published Sep 15, 2025 · Updated Sep 15, 2025

Integer wraparound in affected Linux kernel md/raid0 releases starting at 4.10 allows local users to trigger a kernel warning during RAID0 startup. In dump_zones(), snprintf() reports the length that would have been generated rather than bytes written, so 200 minus len wraps to a large positive size when concatenated device names exceed 200 characters. Reaching the path requires local access and the ability to start a RAID0 array with unusually long constituent device names; the documented consequence is a warning in the kernel formatting path.

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

What happened

Integer wraparound in affected Linux kernel md/raid0 releases starting at 4.10 allows local users to trigger a kernel warning during RAID0 startup. In dump_zones(), snprintf() reports the length that would have been generated rather than bytes written, so 200 minus len wraps to a large positive size when concatenated device names exceed 200 characters. Reaching the path requires local access and the ability to start a RAID0 array with unusually long constituent device names; the documented consequence is a warning in the kernel formatting path.

The record

CVE
CVE-2022-50299
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=4.10
  2. Affected versionversion=766038846e875740cf4c20dfc5d5b292ba47360a <1727fd5015d8f93474148f94e34cda5aa6ad4a43
  3. Affected versionversion=766038846e875740cf4c20dfc5d5b292ba47360a <3b0a2bd51f60418ecd67493586a2bb2174199de3
  4. Affected versionversion=766038846e875740cf4c20dfc5d5b292ba47360a <41ca95033a0c47cd6dace1f0a36a6eb5ebe799e6
  5. Affected versionversion=766038846e875740cf4c20dfc5d5b292ba47360a <5d8259c9d1915a50c60c7d6e9e7fb9b7da64a175
  6. Affected versionversion=766038846e875740cf4c20dfc5d5b292ba47360a <76694e9ce0b2238c0a5f3ba54f9361dd3770ec78
  7. Affected versionversion=766038846e875740cf4c20dfc5d5b292ba47360a <897b1450abe5a67c842a5d24173ce4449ccdfa94
  8. Affected versionversion=766038846e875740cf4c20dfc5d5b292ba47360a <97238b88583c27c9d3b4a0cedb45f816523f17c3
  9. Affected versionversion=766038846e875740cf4c20dfc5d5b292ba47360a <f95825c4e51cf9a653b0ef947ac78401fc9d3a40

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.10; version=766038846e875740cf4c20dfc5d5b292ba47360a <1727fd5015d8f93474148f94e34cda5aa6ad4a43; version=766038846e875740cf4c20dfc5d5b292ba47360a <3b0a2bd51f60418ecd67493586a2bb2174199de3; version=766038846e875740cf4c20dfc5d5b292ba47360a <41ca95033a0c47cd6dace1f0a36a6eb5ebe799e6; version=766038846e875740cf4c20dfc5d5b292ba47360a <5d8259c9d1915a50c60c7d6e9e7fb9b7da64a175; version=766038846e875740cf4c20dfc5d5b292ba47360a <76694e9ce0b2238c0a5f3ba54f9361dd3770ec78; version=766038846e875740cf4c20dfc5d5b292ba47360a <897b1450abe5a67c842a5d24173ce4449ccdfa94; version=766038846e875740cf4c20dfc5d5b292ba47360a <97238b88583c27c9d3b4a0cedb45f816523f17c3; version=766038846e875740cf4c20dfc5d5b292ba47360a <f95825c4e51cf9a653b0ef947ac78401fc9d3a40

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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