ksmbd: drain session procfs readers before dropping table references
Session registration failure and connection cleanup can drop the table
reference while the per-session procfs entry is still accessible. If a
reader holds the last remaining reference, its final put calls
proc_remove() from its own callback and waits for that callback to
finish.
Remove the procfs entry before dropping the table reference in the
registration failure path. Queue sessions removed during connection
cleanup and drain their procfs readers after releasing both session
locks, then return their table references. Keep the global hash node
unhashed while a session is queued so a concurrent unregister cannot
drop the reference again.
Previous-session replacement also destroys the file table before the
session is finally freed. Detach the idr under the lock used by procfs
file counters, and report zero files after it has been detached. This
prevents a reader from accessing the idr during or after its
destruction.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
|
|||||||||||||||
| Linux | Linux | affected |
|
No data.
No data.
No data available yet.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Sat, 07 Nov 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: ksmbd: drain session procfs readers before dropping table references Session registration failure and connection cleanup can drop the table reference while the per-session procfs entry is still accessible. If a reader holds the last remaining reference, its final put calls proc_remove() from its own callback and waits for that callback to finish. Remove the procfs entry before dropping the table reference in the registration failure path. Queue sessions removed during connection cleanup and drain their procfs readers after releasing both session locks, then return their table references. Keep the global hash node unhashed while a session is queued so a concurrent unregister cannot drop the reference again. Previous-session replacement also destroys the file table before the session is finally freed. Detach the idr under the lock used by procfs file counters, and report zero files after it has been detached. This prevents a reader from accessing the idr during or after its destruction. | |
| Title | ksmbd: drain session procfs readers before dropping table references | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-11-07T14:08:47.488Z
Reserved: 2026-09-25T10:25:14.405Z
Link: CVE-2026-99280
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-11-07T14:17:03.453
Modified: 2026-11-07T14:17:03.453
Link: CVE-2026-99280
Redhat
No data.
OpenCVE Enrichment
No data.
No weakness.