Answer in brief
CVE-2026-99280 records a Unknown severity vulnerability in ksmbd: drain session procfs readers before dropping table references. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=d7fd1f98607f2cd358e583f9548bdf0173090a86 <6789f0983f8e85ce3a5ed8c50fc05d613ead9c2c || >=d7fd1f98607f2cd358e583f9548bdf0173090a86 <1c087cf7d5386c708d8984b263280b42b3daada0 || c99ea7855124ca1428a1e59c2b4590aaef34eacf || >=7.2.8 <7.3 | 6789f0983f8e85ce3a5ed8c50fc05d613ead9c2c, 1c087cf7d5386c708d8984b263280b42b3daada0, 7.3 |
| Linux/Linuxgeneric | 7.3 | Not reported |
Published upstream
Nov 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 7, 2026
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.
Quoted source text, attributed separately from HOL analysis.