CVE-2024-38629

Kernel panic via premature file_ida destruction

Published Jun 21, 2024 · Updated May 11, 2026

Use-after-free in Linux kernel 6.4 allows local users to crash the system through Intel idxd work-queue device teardown. The WQ character-device removal path destroys the shared file_ida before a later cdev release calls ida_free() on it. A low-privileged local user must hold and release the device file across work-queue removal; the resulting stale ID access triggers a kernel panic and service interruption.

CVSS severity7.8
High
EPSS probability0.23%
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 6.4 allows local users to crash the system through Intel idxd work-queue device teardown. The WQ character-device removal path destroys the shared file_ida before a later cdev release calls ida_free() on it. A low-privileged local user must hold and release the device file across work-queue removal; the resulting stale ID access triggers a kernel panic and service interruption.

The record

CVE
CVE-2024-38629
Published
Jun 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1529
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 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=6.4
  2. Affected versionversion=e6fd6d7e5f0fe4a17a08e892afb5db800e7794ec <15edb906211bf53e7b5574f7326ab734d6bff4f9
  3. Affected versionversion=e6fd6d7e5f0fe4a17a08e892afb5db800e7794ec <76e43fa6a456787bad31b8d0daeabda27351a480
  4. Affected versionversion=e6fd6d7e5f0fe4a17a08e892afb5db800e7794ec <9eb15f24a0b9b017b39cde8b8c07243676b63687

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.4; version=e6fd6d7e5f0fe4a17a08e892afb5db800e7794ec <15edb906211bf53e7b5574f7326ab734d6bff4f9; version=e6fd6d7e5f0fe4a17a08e892afb5db800e7794ec <76e43fa6a456787bad31b8d0daeabda27351a480; version=e6fd6d7e5f0fe4a17a08e892afb5db800e7794ec <9eb15f24a0b9b017b39cde8b8c07243676b63687

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1529System Shutdown/Reboot

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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