CVE-2026-98452

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

smb: client: clean up failed cached directory opens

open_cached_dir() sends CREATE and QUERY_INFO as a compound request. If

the CREATE succeeds but a later command returns an error, the function

must retain the CREATE FID so common cleanup can issue SMB2_close(). It

also must not treat a response error as a valid CREATE.

Validate the CREATE response before using its fields, record the FIDs, and

mark the handle open before handling errors from later compound commands.

Move the -EREMCHG reconnect handling before response validation so a

missing response does not hide the reconnect request. Count the handle

when it is marked open; confirmed close responses decrement the counter,

while existing close retry behavior remains best effort on transport

failures.

/// 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