CVE-2024-42307

Kernel crash via misordered CIFS initialization cleanup

Published Aug 17, 2024 · Updated May 23, 2026

NULL pointer dereference in the Linux CIFS client allows local users to crash affected kernels during module initialization. The init_cifs error path calls destroy_workqueue on serverclose_wq after cleanup has already made the workqueue pointer NULL because resources are released in the wrong order. Reachability requires a CIFS module initialization failure; the resulting NULL dereference interrupts availability without reported data access or modification.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux CIFS client allows local users to crash affected kernels during module initialization. The init_cifs error path calls destroy_workqueue on serverclose_wq after cleanup has already made the workqueue pointer NULL because resources are released in the wrong order. Reachability requires a CIFS module initialization failure; the resulting NULL dereference interrupts availability without reported data access or modification.

The record

CVE
CVE-2024-42307
Published
Aug 17, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=173217bd73365867378b5e75a86f0049e1069ee8 <193cc89ea0ca1da311877d2b4bb5e9f03bcc82a2
  2. Affected versionversion=173217bd73365867378b5e75a86f0049e1069ee8 <3739d711246d8fbc95ff73dbdace9741cdce4777
  3. Affected versionversion=40a5d14c9d3b585d55d3209fb5efe202dcaac926
  4. Affected versionversion=6.1.85 <6.1.103
  5. Affected versionversion=6.6.26 <6.6.44
  6. Affected versionversion=6.8.5 <6.9
  7. Affected versionversion=6.9
  8. Affected versionversion=6f17163b9339fac92023a1d9bef22128db3b9a4b <160235efb4f9b55212dedff5de0094c606c4b303
  9. Affected versionversion=8c99dfb49bdc17edffc7ff3d46b400c8c291686c <6018971710fdc7739f8655c1540832b4bb903671

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=173217bd73365867378b5e75a86f0049e1069ee8 <193cc89ea0ca1da311877d2b4bb5e9f03bcc82a2; version=173217bd73365867378b5e75a86f0049e1069ee8 <3739d711246d8fbc95ff73dbdace9741cdce4777; version=40a5d14c9d3b585d55d3209fb5efe202dcaac926; version=6.1.85 <6.1.103; version=6.6.26 <6.6.44; version=6.8.5 <6.9; version=6.9; version=6f17163b9339fac92023a1d9bef22128db3b9a4b <160235efb4f9b55212dedff5de0094c606c4b303; version=8c99dfb49bdc17edffc7ff3d46b400c8c291686c <6018971710fdc7739f8655c1540832b4bb903671

Published CVSS scores

5.5NIST NVDCVSS: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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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