Bug 2356646 (CVE-2025-21967)

Summary: CVE-2025-21967 kernel: ksmbd: fix use-after-free in ksmbd_free_work_struct
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-04-01 16:04:13 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix use-after-free in ksmbd_free_work_struct

->interim_entry of ksmbd_work could be deleted after oplock is freed.
We don't need to manage it with linked list. The interim request could be
immediately sent whenever a oplock break wait is needed.
Comment 1 Robb Gatica 2025-04-02 00:57:27 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040146-CVE-2025-21967-114e@gregkh/T