CVE-2022-50067

Kernel memory compromise via stale btrfs pointer

Published Jun 18, 2025 · Updated May 11, 2026

Use-after-free in the btrfs subsystem of Linux kernel 5.13 allows local users to compromise kernel memory after a failed commit. prepare_to_relocate() leaves fs_info->reloc_ctl pointing to freed relocation control data when btrfs_commit_transaction() fails, and btrfs_init_reloc_root() later dereferences it. Triggering requires a btrfs balance before defragmentation plus a transaction failure; successful exploitation can disclose or alter data or crash the host.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the btrfs subsystem of Linux kernel 5.13 allows local users to compromise kernel memory after a failed commit. prepare_to_relocate() leaves fs_info->reloc_ctl pointing to freed relocation control data when btrfs_commit_transaction() fails, and btrfs_init_reloc_root() later dereferences it. Triggering requires a btrfs balance before defragmentation plus a transaction failure; successful exploitation can disclose or alter data or crash the host.

The record

CVE
CVE-2022-50067
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
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

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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=1a5353475df8fcaf200fecc9e961a3900d15e891 <ff0e8ed8dfb584575cffc1561f17a1d094e8565b
  2. Affected versionversion=4223d91ca1b5bf3928e5722c3c6b3fdb49250ab3 <8e546674031fc1576da501e27a8fd165222e5a37
  3. Affected versionversion=499d29bf151951399367ba83645abfdb429a3af9 <dcb11fe0a0a9cca2b7425191b9bf30dc29f2ad0f
  4. Affected versionversion=5.13
  5. Affected versionversion=6f371623f315c26100e603c2e8837cdbe130f9e0 <b60e862e133f646f19023ece1d476d630a660de1
  6. Affected versionversion=fb686c6824dd6294ca772b92424b8fba666e7d00 <5d741afed0bac206640cc64d77b97853283cf719
  7. Affected versionversion=fb686c6824dd6294ca772b92424b8fba666e7d00 <78f8c2370e3d33e35f23bdc648653d779aeacb6e
  8. Affected versionversion=fb686c6824dd6294ca772b92424b8fba666e7d00 <85f02d6c856b9f3a0acf5219de6e32f58b9778eb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1a5353475df8fcaf200fecc9e961a3900d15e891 <ff0e8ed8dfb584575cffc1561f17a1d094e8565b; version=4223d91ca1b5bf3928e5722c3c6b3fdb49250ab3 <8e546674031fc1576da501e27a8fd165222e5a37; version=499d29bf151951399367ba83645abfdb429a3af9 <dcb11fe0a0a9cca2b7425191b9bf30dc29f2ad0f; version=5.13; version=6f371623f315c26100e603c2e8837cdbe130f9e0 <b60e862e133f646f19023ece1d476d630a660de1; version=fb686c6824dd6294ca772b92424b8fba666e7d00 <5d741afed0bac206640cc64d77b97853283cf719; version=fb686c6824dd6294ca772b92424b8fba666e7d00 <78f8c2370e3d33e35f23bdc648653d779aeacb6e; version=fb686c6824dd6294ca772b92424b8fba666e7d00 <85f02d6c856b9f3a0acf5219de6e32f58b9778eb

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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