Bug 2425075 (CVE-2023-54076)

Summary: CVE-2023-54076 kernel: smb: client: fix missed ses refcounting
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-12-24 13:06:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix missed ses refcounting

Use new cifs_smb_ses_inc_refcount() helper to get an active reference
of @ses and @ses->dfs_root_ses (if set).  This will prevent
@ses->dfs_root_ses of being put in the next call to cifs_put_smb_ses()
and thus potentially causing an use-after-free bug.
Comment 1 Alexander B 2025-12-25 04:24:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122433-CVE-2023-54076-e317@gregkh/T