CVE-2022-2327

Kernel memory corruption via missing io_uring work flags

Published Jul 22, 2022 · Updated Apr 21, 2025

Use-after-free in Linux Kernel io_uring allows local users to disclose or modify data through crafted asynchronous I/O requests. The io_op_defs table omits IO_WQ_WORK_FILES or IO_WQ_WORK_FS on several operations, so workers mishandle caller identity references and can release them twice. A local low-privileged user must submit affected io_uring operations; successful exploitation corrupts kernel memory and compromises confidentiality or integrity.

CVSS severity7.5
High
EPSS probability0.27%
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 Linux Kernel io_uring allows local users to disclose or modify data through crafted asynchronous I/O requests. The io_op_defs table omits IO_WQ_WORK_FILES or IO_WQ_WORK_FS on several operations, so workers mishandle caller identity references and can release them twice. A local low-privileged user must submit affected io_uring operations; successful exploitation corrupts kernel memory and compromises confidentiality or integrity.

The record

CVE
CVE-2022-2327
Published
Jul 22, 2022
Updated
Apr 21, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, CWE-415, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 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=unspecified <df3f3bb5059d20ef094d6b2f0256c4bf4127a859

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=unspecified <df3f3bb5059d20ef094d6b2f0256c4bf4127a859

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5Google Inc.CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

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

CWE-416Use After Free
CWE-415Double 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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