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CVE-2026-90152— smb/server: fix session leak in ksmbd_session_register()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： smb/server: 修复 ksmbd_session_register() 中的会话泄漏问题 问题背景如下： 根本原因： 在创建 SMB2 会话时，引用计数被初始化为 2（一个用于会话表 中的哈希节点，一个用于连接对象 中的索引数组）。当 失败时，原代码仅减少了“用户引用”，但没有从 中移除该会话，也没有释放对应的表引用，导致会话对象永久驻留，造成内存泄漏。 修复方案： 若 失败，应同时执行以下操作： 1. 从 中移除该会话节点； 2. 释放该会话在 中占用的引用（

AI Predicted 4.8 Difficulty: Moderate EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux f5c779b7ddbda30866cf2a27c63e34158f858c73< 03a22a003f41b182245e6c71fe565e277cff7094 affected
f5c779b7ddbda30866cf2a27c63e34158f858c73< b967a595fb735d313a8676b2ca6a4cba38506482 affected
f5c779b7ddbda30866cf2a27c63e34158f858c73< 55c677619084f9c9fa4146d933cc8ccafc924c87 affected
f5c779b7ddbda30866cf2a27c63e34158f858c73< 99b25b046e47e4904373cfeb445c5483f1633d88 affected
708c304b583d789957399dd8237f212cf8ad1e4d affected
f623f627ad2b1dc215ab3b0df53fb05cfd3a1c3b affected
d270631c21e68fb8016d6e231d022d7023a2df6f affected
02f41d88f15d6b7d523e52cc3f87488f57e9265b affected
… +10 more rows
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I. Basic Information for CVE-2026-90152

Vulnerability Information
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Vulnerability Title
smb/server: fix session leak in ksmbd_session_register()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux f5c779b7ddbda30866cf2a27c63e34158f858c73 ~ 03a22a003f41b182245e6c71fe565e277cff7094 -
Linux Linux 6.4 -

II. Public POCs for CVE-2026-90152

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III. Intelligence Information for CVE-2026-90152

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Patches & Fixes for CVE-2026-90152 (4)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90162 8.8 HIGH ksmbd: defer publishing granted locks to prevent UAF/double-free race
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90255 8.8 HIGH Bluetooth: hci_conn: fix the SCO setup context lifetime

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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