CVE-2024-42124

RT kernel crash via preemptible processor-ID lookup

Published Jul 30, 2024 · Updated May 11, 2026

Improper execution-context handling in the Linux qedf SCSI driver allows local users to crash an RT kernel during task management. qedf_execute_tmf() calls smp_processor_id() while preemption remains enabled, causing the kernel's processor-ID safety check to invoke BUG_ON(). Reachability requires an RT kernel using the qedf driver and a task-management reset path; the bounded consequence is a kernel crash and service interruption.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper execution-context handling in the Linux qedf SCSI driver allows local users to crash an RT kernel during task management. qedf_execute_tmf() calls smp_processor_id() while preemption remains enabled, causing the kernel's processor-ID safety check to invoke BUG_ON(). Reachability requires an RT kernel using the qedf driver and a task-management reset path; the bounded consequence is a kernel crash and service interruption.

The record

CVE
CVE-2024-42124
Published
Jul 30, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 30, 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=4.11
  2. Affected versionversion=61d8658b4a435eac729966cc94cdda077a8df5cd <0a8a91932b2772e75bf3f6d133ca4225d1d3e920
  3. Affected versionversion=61d8658b4a435eac729966cc94cdda077a8df5cd <0d8b637c9c5eeaa1a4e3dfb336f3ff918eb64fec
  4. Affected versionversion=61d8658b4a435eac729966cc94cdda077a8df5cd <2b9c7787cfcd1e76d873a78f16cf45bfa4b100ea
  5. Affected versionversion=61d8658b4a435eac729966cc94cdda077a8df5cd <4f314aadeed8cdf42c8cf30769425b5e44702748
  6. Affected versionversion=61d8658b4a435eac729966cc94cdda077a8df5cd <5ceb40cdee721e13cbe15a0515cacf984e11236b
  7. Affected versionversion=61d8658b4a435eac729966cc94cdda077a8df5cd <b6ded5316ec56e973dcf5f9997945aad01a9f062
  8. Affected versionversion=61d8658b4a435eac729966cc94cdda077a8df5cd <fa49c65a1cec6a3901ef884fdb24d98068b63493

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=61d8658b4a435eac729966cc94cdda077a8df5cd <0a8a91932b2772e75bf3f6d133ca4225d1d3e920; version=61d8658b4a435eac729966cc94cdda077a8df5cd <0d8b637c9c5eeaa1a4e3dfb336f3ff918eb64fec; version=61d8658b4a435eac729966cc94cdda077a8df5cd <2b9c7787cfcd1e76d873a78f16cf45bfa4b100ea; version=61d8658b4a435eac729966cc94cdda077a8df5cd <4f314aadeed8cdf42c8cf30769425b5e44702748; version=61d8658b4a435eac729966cc94cdda077a8df5cd <5ceb40cdee721e13cbe15a0515cacf984e11236b; version=61d8658b4a435eac729966cc94cdda077a8df5cd <b6ded5316ec56e973dcf5f9997945aad01a9f062; version=61d8658b4a435eac729966cc94cdda077a8df5cd <fa49c65a1cec6a3901ef884fdb24d98068b63493

Published CVSS scores

5.5Oracle LinuxCVSS: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 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

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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