CVE-2023-52747

Local service interruption via failed ioctl cleanup

Published May 21, 2024 · Updated May 11, 2026

Resource leak in the Linux kernel hfi1 driver allows local users to exhaust kernel resources through a failed expected-receive ioctl. The user_exp_rcv_setup function returns EFAULT when copy_to_user fails but does not call hfi1_user_exp_rcv_invalid to release newly allocated expected-receive TIDs. Access to an HFI1 device and a userspace result buffer that faults during copyout is required; repeated failures can deplete resources and interrupt service.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the Linux kernel hfi1 driver allows local users to exhaust kernel resources through a failed expected-receive ioctl. The user_exp_rcv_setup function returns EFAULT when copy_to_user fails but does not call hfi1_user_exp_rcv_invalid to release newly allocated expected-receive TIDs. Access to an HFI1 device and a userspace result buffer that faults during copyout is required; repeated failures can deplete resources and interrupt service.

The record

CVE
CVE-2023-52747
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 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=4.15
  2. Affected versionversion=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <00d9e212b8a39e6ffcf31b9d2e503d2bf6009d45
  3. Affected versionversion=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <0a4f811f2e5d07bbd0c9226f4afb0a1270a831ae
  4. Affected versionversion=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <6601fc0d15ffc20654e39486f9bef35567106d68
  5. Affected versionversion=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <7896accedf5bf1277d2f305718e36dc8bac7e321
  6. Affected versionversion=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <79b595d9591426156a9e0635a5b5115508a36fef
  7. Affected versionversion=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <9bae58d58b6bb73b572356b31a62d2afc7378d12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <00d9e212b8a39e6ffcf31b9d2e503d2bf6009d45; version=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <0a4f811f2e5d07bbd0c9226f4afb0a1270a831ae; version=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <6601fc0d15ffc20654e39486f9bef35567106d68; version=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <7896accedf5bf1277d2f305718e36dc8bac7e321; version=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <79b595d9591426156a9e0635a5b5115508a36fef; version=f404ca4c7ea8e650ba09ba87c71c7a89c865d5be <9bae58d58b6bb73b572356b31a62d2afc7378d12

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-401Missing Release of Memory after Effective Lifetime
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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