CVE-2024-53052

Privileged filesystem hang via blocking NOWAIT write

Published Nov 19, 2024 · Updated May 11, 2026

Improper locking in affected Linux kernel releases through 6.12-rc5 allows local users to hang filesystem operations during a mount freeze. The io_uring write path calls kiocb_start_write() unconditionally for an O_DIRECT write, blocking on the superblock read-write semaphore instead of honoring IOCB_NOWAIT while the freezer waits for earlier writes. Triggering the deadlock requires CAP_SYS_ADMIN, a mount freeze, and overlapping io_uring O_DIRECT writes; regular users cannot trigger it.

CVSS severity4.4
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper locking in affected Linux kernel releases through 6.12-rc5 allows local users to hang filesystem operations during a mount freeze. The io_uring write path calls kiocb_start_write() unconditionally for an O_DIRECT write, blocking on the superblock read-write semaphore instead of honoring IOCB_NOWAIT while the freezer waits for earlier writes. Triggering the deadlock requires CAP_SYS_ADMIN, a mount freeze, and overlapping io_uring O_DIRECT writes; regular users cannot trigger it.

The record

CVE
CVE-2024-53052
Published
Nov 19, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1489
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Nov 19, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <003d2996964c03dfd34860500428f4cdf1f5879e
  2. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <1d60d74e852647255bd8e76f5a22dc42531e4389
  3. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <26b8c48f369b7591f5679e0b90612f4862a32929
  4. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <485d9232112b17f389b29497ff41b97b3189546b
  5. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <4e24041ba86d50aaa4c792ae2c88ed01b3d96243
  6. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <9e8debb8e51354b201db494689198078ec2c1e75
  7. Affected versionversion=5.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <003d2996964c03dfd34860500428f4cdf1f5879e; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <1d60d74e852647255bd8e76f5a22dc42531e4389; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <26b8c48f369b7591f5679e0b90612f4862a32929; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <485d9232112b17f389b29497ff41b97b3189546b; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <4e24041ba86d50aaa4c792ae2c88ed01b3d96243; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <9e8debb8e51354b201db494689198078ec2c1e75; version=5.1

Published CVSS scores

4.4CanonicalCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4.4NIST NVDCVSS: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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1489Service Stop

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo