Bug 2401424 (CVE-2025-39943) - CVE-2025-39943 kernel: ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer
Summary: CVE-2025-39943 kernel: ksmbd: smbdirect: validate data_offset and data_length...
Keywords:
Status: NEW
Alias: CVE-2025-39943
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-10-04 08:02 UTC by OSIDB Bzimport
Modified: 2025-10-06 15:52 UTC (History)
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Description OSIDB Bzimport 2025-10-04 08:02:31 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer

If data_offset and data_length of smb_direct_data_transfer struct are
invalid, out of bounds issue could happen.
This patch validate data_offset and data_length field in recv_done.
Comment 1 Jon Moroney 2025-10-06 15:50:57 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100419-CVE-2025-39943-f5d8@gregkh/T
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