CVE-2026-90152 (GCVE-0-2026-90152)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:06 – Updated: 2026-09-17 16:06
VLAI
Title
smb/server: fix session leak in ksmbd_session_register()
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f5c779b7ddbda30866cf2a27c63e34158f858c73 , < 03a22a003f41b182245e6c71fe565e277cff7094 (git)
Affected: f5c779b7ddbda30866cf2a27c63e34158f858c73 , < b967a595fb735d313a8676b2ca6a4cba38506482 (git)
Affected: f5c779b7ddbda30866cf2a27c63e34158f858c73 , < 55c677619084f9c9fa4146d933cc8ccafc924c87 (git)
Affected: f5c779b7ddbda30866cf2a27c63e34158f858c73 , < 99b25b046e47e4904373cfeb445c5483f1633d88 (git)
Affected: 708c304b583d789957399dd8237f212cf8ad1e4d (git)
Affected: f623f627ad2b1dc215ab3b0df53fb05cfd3a1c3b (git)
Affected: d270631c21e68fb8016d6e231d022d7023a2df6f (git)
Affected: 02f41d88f15d6b7d523e52cc3f87488f57e9265b (git)
Affected: 5.15.145 , < 5.16 (semver)
Affected: 6.1.29 , < 6.2 (semver)
Affected: 6.2.16 , < 6.3 (semver)
Affected: 6.3.2 , < 6.4 (semver)
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Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix session leak in ksmbd_session_register()\n\nSee the procedure below:\n\n  smb2_sess_setup\n    ksmbd_smb2_session_create\n      __session_create\n        atomic_set(\u0026sess-\u003erefcnt, 2)\n        hash_add(sessions_table, \u0026sess-\u003ehlist, sess-\u003eid)\n    ksmbd_session_register\n      xa_store(\u0026conn-\u003esessions, sess-\u003eid, sess) // fail\n    ksmbd_user_session_put\n      atomic_dec(\u0026sess-\u003erefcnt) // refcnt is 1, session is not freed\n\nRemove the session from sessions_table and drop its table reference if\nxa_store() fails."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:06:45.641Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/99b25b046e47e4904373cfeb445c5483f1633d88"
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      ],
      "title": "smb/server: fix session leak in ksmbd_session_register()",
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    "cveId": "CVE-2026-90152",
    "datePublished": "2026-09-17T16:06:45.641Z",
    "dateReserved": "2026-09-11T19:38:34.789Z",
    "dateUpdated": "2026-09-17T16:06:45.641Z",
    "state": "PUBLISHED"
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix session leak in ksmbd_session_register()\n\nSee the procedure below:\n\n  smb2_sess_setup\n    ksmbd_smb2_session_create\n      __session_create\n        atomic_set(\u0026sess-\u003erefcnt, 2)\n        hash_add(sessions_table, \u0026sess-\u003ehlist, sess-\u003eid)\n    ksmbd_session_register\n      xa_store(\u0026conn-\u003esessions, sess-\u003eid, sess) // fail\n    ksmbd_user_session_put\n      atomic_dec(\u0026sess-\u003erefcnt) // refcnt is 1, session is not freed\n\nRemove the session from sessions_table and drop its table reference if\nxa_store() fails."
          }
        ],
        "id": "CVE-2026-90152",
        "lastModified": "2026-09-17T17:17:08.207",
        "metrics": {},
        "published": "2026-09-17T17:17:08.207",
        "references": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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