Bug 2422705 (CVE-2025-68226) - CVE-2025-68226 kernel: Linux kernel SMB client: Denial of Service due to Use-After-Free
Summary: CVE-2025-68226 kernel: Linux kernel SMB client: Denial of Service due to Use-...
Keywords:
Status: NEW
Alias: CVE-2025-68226
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-16 14:05 UTC by OSIDB Bzimport
Modified: 2026-01-28 07:58 UTC (History)
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Description OSIDB Bzimport 2025-12-16 14:05:22 UTC 
In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix incomplete backport in cfids_invalidation_worker()

The previous commit bdb596ceb4b7 ("smb: client: fix potential UAF in
smb2_close_cached_fid()") was an incomplete backport and missed one
kref_put() call in cfids_invalidation_worker() that should have been
converted to close_cached_dir().
Comment 1 Alexander B 2025-12-17 01:43:21 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121635-CVE-2025-68226-6559@gregkh/T
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