CVE-2026-90152 PUBLISHED

smb/server: fix session leak in ksmbd_session_register()

Assigner: Linux
Reserved: 11.09.2026 Published: 17.09.2026 Updated: 17.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from f5c779b7ddbda30866cf2a27c63e34158f858c73 to 03a22a003f41b182245e6c71fe565e277cff7094 (excl.)
  • affected from f5c779b7ddbda30866cf2a27c63e34158f858c73 to b967a595fb735d313a8676b2ca6a4cba38506482 (excl.)
  • affected from f5c779b7ddbda30866cf2a27c63e34158f858c73 to 55c677619084f9c9fa4146d933cc8ccafc924c87 (excl.)
  • affected from f5c779b7ddbda30866cf2a27c63e34158f858c73 to 99b25b046e47e4904373cfeb445c5483f1633d88 (excl.)
  • Version 708c304b583d789957399dd8237f212cf8ad1e4d is affected
  • Version f623f627ad2b1dc215ab3b0df53fb05cfd3a1c3b is affected
  • Version d270631c21e68fb8016d6e231d022d7023a2df6f is affected
  • Version 02f41d88f15d6b7d523e52cc3f87488f57e9265b is affected
  • affected from 5.15.145 to 5.16 (excl.)
  • affected from 6.1.29 to 6.2 (excl.)
  • affected from 6.2.16 to 6.3 (excl.)
  • affected from 6.3.2 to 6.4 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.4 is affected
  • unaffected from 0 to 6.4 (excl.)
  • unaffected from 6.12.110 to 6.12.* (incl.)
  • unaffected from 6.18.52 to 6.18.* (incl.)
  • unaffected from 7.2.6 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References