smb/server: fix session leak in ksmbd_session_register() (CVE-2026-90152) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90152

smb/server: fix session leak in ksmbd_session_register()

Answer in brief

CVE-2026-90152 records a Unknown severity vulnerability in smb/server: fix session leak in ksmbd_session_register(). 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	>=f5c779b7ddbda30866cf2a27c63e34158f858c73 <03a22a003f41b182245e6c71fe565e277cff7094 \|\| >=f5c779b7ddbda30866cf2a27c63e34158f858c73 <b967a595fb735d313a8676b2ca6a4cba38506482 \|\| >=f5c779b7ddbda30866cf2a27c63e34158f858c73 <55c677619084f9c9fa4146d933cc8ccafc924c87 \|\| >=f5c779b7ddbda30866cf2a27c63e34158f858c73 <99b25b046e47e4904373cfeb445c5483f1633d88 \|\| 708c304b583d789957399dd8237f212cf8ad1e4d \|\| f623f627ad2b1dc215ab3b0df53fb05cfd3a1c3b \|\| d270631c21e68fb8016d6e231d022d7023a2df6f \|\| 02f41d88f15d6b7d523e52cc3f87488f57e9265b \|\| >=5.15.145 <5.16 \|\| >=6.1.29 <6.2 \|\| >=6.2.16 <6.3 \|\| >=6.3.2 <6.4	03a22a003f41b182245e6c71fe565e277cff7094, b967a595fb735d313a8676b2ca6a4cba38506482, 55c677619084f9c9fa4146d933cc8ccafc924c87, 99b25b046e47e4904373cfeb445c5483f1633d88, 5.16, 6.2, 6.3, 6.4
Linux/Linuxgeneric	6.4	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 03a22a003f41b182245e6c71fe565e277cff7094 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 session leak in ksmbd_session_register() See the procedure below: smb2_sess_setup ksmbd_smb2_session_create __session_create atomic_set(&sess->refcnt, 2) hash_add(sessions_table, &sess->hlist, sess->id) ksmbd_session_register xa_store(&conn->sessions, sess->id, sess) // fail ksmbd_user_session_put atomic_dec(&sess->refcnt) // refcnt is 1, session is not freed Remove the session from sessions_table and drop its table reference if xa_store() fails.

Quoted source text, attributed separately from HOL analysis.