Live › vulnerability › CVE-2026-98450
Go to dashboardWhen a compound SMB request is interrupted or a later response fails, an earlier CREATE may have opened a remote file handle that the kernel never closes. An attacker who can reach a malicious or compromised SMB server can make the client leak server-side handles.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Systems that mount SMB/CIFS shares with the Linux kernel cifs client are exposed. Systems that do not mount SMB shares, or that use only other filesystems, can skip it.
No product ranges from the sources yet.
uname -r and compare it against the fixed kernel release in the NVD recordlsmod | grep cifsEach row is the first time that source carried this signal. The analyst’s rows are its own findings.
In the Linux kernel, the following vulnerability has been resolved:
smb: client: close completed creates on compound wait errors
compound_send_recv() waits for responses in order. If a later wait is interrupted, or if a later MID fails during response synchronization, an earlier CREATE may already have opened a remote handle. The earlier mid is then released without invoking handle_cancelled_mid(), leaving the remote handle open because no FID was copied to the caller.
Mark completed earlier mids as cancelled when a compound wait or MID synchronization aborts. Keep their response buffers attached while the MIDs are synchronized, and transfer them only after synchronization of the processed responses, so the release path can inspect successful CREATE responses and queue SMB2_close() after a later failure. Account for a remote open only after the close work is allocated and before it is queued, since the caller has not yet updated num_remote_opens. Mark the create+close compound used by smb2_unlink() so it is not closed again. Non-CREATE responses and compounds that already include a close keep their existing behavior.
This page as .md · .json · in your agent: get_signal("CVE-2026-98450")
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