CVE-2022-50571

Kernel warning via unlocked cache cleanup

Published Oct 22, 2025 · Updated Oct 22, 2025

A btrfs cache-load cleanup flaw in Linux 5.11 through 5.19.16 and 6.0 allows attackers to trigger a kernel warning. On the error path, __btrfs_remove_free_space_cache frees a temporary control structure and updates discardable statistics without holding the live block group's tree_lock. The cache load must fail; the public record demonstrates a lockdep warning but does not establish attacker control, a crash, or data loss.

CVSS severityUnavailable
Unscored
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

A btrfs cache-load cleanup flaw in Linux 5.11 through 5.19.16 and 6.0 allows attackers to trigger a kernel warning. On the error path, __btrfs_remove_free_space_cache frees a temporary control structure and updates discardable statistics without holding the live block group's tree_lock. The cache load must fail; the public record demonstrates a lockdep warning but does not establish attacker control, a crash, or data loss.

The record

CVE
CVE-2022-50571
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <819a61301275dcc573e3f520be3dc2c8531bee2d
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a1ae2781dee9fc21ca82db682d37bea4bd074ad

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <819a61301275dcc573e3f520be3dc2c8531bee2d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a1ae2781dee9fc21ca82db682d37bea4bd074ad

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
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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