Answer in brief
CVE-2026-52911 records a High severity (CVSS 8.8) vulnerability in ksmbd: scope conn->binding slowpath to bound sessions only. 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.
CVSS is 8.8. 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 | >=f5a544e3bab78142207e0242d22442db85ba1eff <e74c00c6af428a39e564cdc5bd3a3648c6d8de87 || >=f5a544e3bab78142207e0242d22442db85ba1eff <e3a93ce6e25757b8f375e38b8f91e1d9da4edc1a || >=f5a544e3bab78142207e0242d22442db85ba1eff <1ff46c9915c1cbf454db58a8cb87f7cac818e6a6 || >=f5a544e3bab78142207e0242d22442db85ba1eff <974c1c224e85549dc3459f3bb2255bbbdd2b9372 || >=f5a544e3bab78142207e0242d22442db85ba1eff <2cc8a4db633b10715450b291c1343859a4b2c509 || >=f5a544e3bab78142207e0242d22442db85ba1eff <1e2bec062c5c9ec282636715166056d0998d746d || >=f5a544e3bab78142207e0242d22442db85ba1eff <b0da97c034b6107d14e537e212d4ce8b22109a58 | e74c00c6af428a39e564cdc5bd3a3648c6d8de87, e3a93ce6e25757b8f375e38b8f91e1d9da4edc1a, 1ff46c9915c1cbf454db58a8cb87f7cac818e6a6, 974c1c224e85549dc3459f3bb2255bbbdd2b9372, 2cc8a4db633b10715450b291c1343859a4b2c509, 1e2bec062c5c9ec282636715166056d0998d746d, b0da97c034b6107d14e537e212d4ce8b22109a58 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Jun 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 21, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: scope conn->binding slowpath to bound sessions only When the binding SESSION_SETUP sets conn->binding = true, the flag stays set after the call so that the global session lookup in ksmbd_session_lookup_all() can find the session, which was not added to conn->sessions. Because the flag is connection-wide, the global lookup path will also resolve any other session by id if asked. Tighten the global lookup so that the returned session must have this connection registered in its channel xarray (sess->ksmbd_chann_list). The channel entry is installed by the existing binding_session path in ntlm_authenticate()/krb5_authenticate() when a SESSION_SETUP completes successfully, so this condition is a strict equivalent of "this connection has been accepted as a channel of this session". Connections that have not bound to a given session cannot reach it via the global table. The existing conn->binding gate for entering the slowpath is preserved so that non-binding connections keep the fast-path-only behavior, and the session->state check is unchanged.
Quoted source text, attributed separately from HOL analysis.