CVE-2026-98450

/// Technical description

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

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References