What’s Vulnerable › Vulnerabilities

CVE-2024-42307: cifs: fix potential null pointer use in destroy_workqueue in init_cifs error path

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-17 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: fix potential null pointer use in destroy_workqueue in init_cifs error path Dan Carpenter reported a Smack static checker warning: fs/smb/client/cifsfs.c:1981 init_cifs() error: we previously assumed 'serverclose_wq' could be null (see line 1895) The patch which introduced the serverclose workqueue used the wrong oredering in error paths in init_cifs() for freeing it on errors.

Affected products

• Linux kernel: from 6.1.85 before 6.1.103; from 6.6.26 before 6.6.44; from 6.8.5 before 6.10.3 — fixed in 6.1.103, 6.10.3, 6.6.44

How to fix

Upgrade to a fixed version: Linux kernel 6.1.103, 6.10.3, 6.6.44. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/160235efb4f9b55212dedff5de0094c606c4b303
• https://git.kernel.org/stable/c/193cc89ea0ca1da311877d2b4bb5e9f03bcc82a2
• https://git.kernel.org/stable/c/3739d711246d8fbc95ff73dbdace9741cdce4777
• https://git.kernel.org/stable/c/6018971710fdc7739f8655c1540832b4bb903671
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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