smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request() (CVE-2026-90166) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90166

smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request()

Answer in brief

CVE-2026-90166 records a Unknown severity vulnerability in smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request(). 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.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

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.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <4eb74a34ea401abfbbd5991076715dae3de938df \|\| >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <8461f27902727ad434375caf13a0100aafc0340f \|\| >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <7065d3648b1a48d2c49da3d6364dd3c4d503b10c \|\| >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <d2ccf905f47d2344270749f4dfa905afcd3edeb0	4eb74a34ea401abfbbd5991076715dae3de938df, 8461f27902727ad434375caf13a0100aafc0340f, 7065d3648b1a48d2c49da3d6364dd3c4d503b10c, d2ccf905f47d2344270749f4dfa905afcd3edeb0
Linux/Linuxgeneric	5.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 4eb74a34ea401abfbbd5991076715dae3de938df if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request() See the procedure below: ksmbd_tree_conn_connect ksmbd_share_config_get share->name = kstrdup() // fail if (!test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) // false // do not check `share->name` ksmbd_ipc_tree_connect_request strlen(share->name) // null-ptr-deref

Quoted source text, attributed separately from HOL analysis.