CVE-2024-40922

Privileged service interruption via stale task state

Published Jul 12, 2024 · Updated May 11, 2026

Denial of service in the Linux kernel allows local users to interrupt service through io_uring buffer unregistration. io_rsrc_ref_quiesce fails to restore TASK_RUNNING after io_run_task_work_sig exits the wait loop, then attempts to acquire a mutex while the task remains non-running. Reachability requires local access to the io_uring registration syscall, and Oracle's published assessment further requires high privileges; the bounded impact is loss of availability.

CVSS severity4.4
Medium
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

Denial of service in the Linux kernel allows local users to interrupt service through io_uring buffer unregistration. io_rsrc_ref_quiesce fails to restore TASK_RUNNING after io_run_task_work_sig exits the wait loop, then attempts to acquire a mutex while the task remains non-running. Reachability requires local access to the io_uring registration syscall, and Oracle's published assessment further requires high privileges; the bounded impact is loss of availability.

The record

CVE
CVE-2024-40922
Published
Jul 12, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 12, 2024CVE 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=4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f <0c9df3df0c888d9ec8d11a68474a4aa04d371cff
  2. Affected versionversion=4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f <4429c6c77e176a4c5aa7a3bbd1632f9fc0582518
  3. Affected versionversion=4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f <54559642b96116b45e4b5ca7fd9f7835b8561272
  4. Affected versionversion=6.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f <0c9df3df0c888d9ec8d11a68474a4aa04d371cff; version=4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f <4429c6c77e176a4c5aa7a3bbd1632f9fc0582518; version=4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f <54559642b96116b45e4b5ca7fd9f7835b8561272; version=6.4

Published CVSS scores

4.4Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:H/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
Privilegesadmin
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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