CVE-2024-56623

System crash via double-stopped kernel thread

Published Dec 27, 2024 · Updated May 11, 2026

Use-after-free in the Linux kernel qla2xxx SCSI driver allows local users to crash the system by unloading the driver. During removal, the UNLOADING flag can make dpc_thread exit and free itself before qla2x00_remove_one calls kthread_stop on the freed task. Triggering the flaw requires local access and module removal while dpc_thread is exiting; the documented consequence is a kernel crash.

CVSS severity7.8
High
EPSS probability0.22%
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 the Linux kernel qla2xxx SCSI driver allows local users to crash the system by unloading the driver. During removal, the UNLOADING flag can make dpc_thread exit and free itself before qla2x00_remove_one calls kthread_stop on the freed task. Triggering the flaw requires local access and module removal while dpc_thread is exiting; the documented consequence is a kernel crash.

The record

CVE
CVE-2024-56623
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=4.8
  2. Affected versionversion=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <07c903db0a2ff84b68efa1a74a4de353ea591eb0
  3. Affected versionversion=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <12f04fc8580eafb0510f805749553eb6213f323e
  4. Affected versionversion=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <15369e774f27ec790f207de87c0b541e3f90b22d
  5. Affected versionversion=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <6abf16d3c915b2feb68c1c8b25fcb71b13f98478
  6. Affected versionversion=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <b3e6f25176f248762a24d25ab8cf8c5e90874f80
  7. Affected versionversion=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <ca36d9d53745d5ec8946ef85006d4da605ea7c54

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <07c903db0a2ff84b68efa1a74a4de353ea591eb0; version=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <12f04fc8580eafb0510f805749553eb6213f323e; version=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <15369e774f27ec790f207de87c0b541e3f90b22d; version=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <6abf16d3c915b2feb68c1c8b25fcb71b13f98478; version=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <b3e6f25176f248762a24d25ab8cf8c5e90874f80; version=a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 <ca36d9d53745d5ec8946ef85006d4da605ea7c54

Published CVSS scores

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 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-416Use After Free
T1499.004Application or System Exploitation

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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