Bug 2356623 (CVE-2025-21955) - CVE-2025-21955 kernel: ksmbd: prevent connection release during oplock break notification
Summary: CVE-2025-21955 kernel: ksmbd: prevent connection release during oplock break ...
Keywords:
Status: NEW
Alias: CVE-2025-21955
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-04-01 16:03 UTC by OSIDB Bzimport
Modified: 2025-04-02 02:46 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-04-01 16:03:04 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: prevent connection release during oplock break notification

ksmbd_work could be freed when after connection release.
Increment r_count of ksmbd_conn to indicate that requests
are not finished yet and to not release the connection.
Comment 1 Robb Gatica 2025-04-02 02:41:06 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040143-CVE-2025-21955-c393@gregkh/T
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