CVE-2024-41080

Local system hang via reversed io_uring lock order

Published Jul 29, 2024 · Updated May 11, 2026

Improper locking in the Linux kernel allows local users to hang the system through the io_uring worker-limit registration path. io_register_iowq_max_workers() calls io_put_sq_data() while retaining uring_lock, and the callee then acquires sqd->lock in the conflicting order. A low-privilege local account must reach that registration path; the documented consequence is an availability-only deadlock.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux kernel allows local users to hang the system through the io_uring worker-limit registration path. io_register_iowq_max_workers() calls io_put_sq_data() while retaining uring_lock, and the callee then acquires sqd->lock in the conflicting order. A low-privilege local account must reach that registration path; the documented consequence is an availability-only deadlock.

The record

CVE
CVE-2024-41080
Published
Jul 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 29, 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=2b188cc1bb857a9d4701ae59aa7768b5124e262e <73254a297c2dd094abec7c9efee32455ae875bdf
  2. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <950ac86cff338ab56e2eaf611f4936ee34893b63
  3. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <97ed7ff58de66c544692b3c2b988f3f594348de0
  4. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <b17397a0a5c56e111f61cb5b77d162664dc00de9
  5. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <b571a367502c7ef94c688ef9c7f7d69a2ce3bcca
  6. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <fdacd09f2ddf7a00787291f08ee48c0421e5b709
  7. Affected versionversion=5.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <73254a297c2dd094abec7c9efee32455ae875bdf; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <950ac86cff338ab56e2eaf611f4936ee34893b63; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <97ed7ff58de66c544692b3c2b988f3f594348de0; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <b17397a0a5c56e111f61cb5b77d162664dc00de9; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <b571a367502c7ef94c688ef9c7f7d69a2ce3bcca; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <fdacd09f2ddf7a00787291f08ee48c0421e5b709; version=5.1

Published CVSS scores

5.5NVDCVSS: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

CWE-667Improper Locking
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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