CVE-2026-98162

smb/server: fix tree connection leak in smb2_tree_connect()

MEDIUM

5.5

CVSS Score

Published: September 25, 2026 at 01:06 PM UTC

Updated: October 21, 2026 at 01:21 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

Description

In the Linux kernel, the following vulnerability has been resolved: smb/server: fix tree connection leak in smb2_tree_connect() See the procedure below: smb2_tree_connect ksmbd_tree_conn_connect xa_store(&sess->tree_conns, tree_conn->id, tree_conn) ksmbd_counter_inc(KSMBD_COUNTER_TREE_CONNS) ksmbd_share_tree_conn_inc(sc) ksmbd_iov_pin_rsp // fail status.ret = KSMBD_TREE_CONN_STATUS_NOMEM // do not disconnect tree_conn Disconnect the new tree connection if ksmbd_iov_pin_rsp() fails.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

All versions5.15.145 ≤ v < 5.166.1.71 ≤ v < 6.26.6 ≤ v < 7.2.65.15.145 6.1.71 6.69f297df20d93411c0b4ddad7f88ba04a7cd36e77e2b76ab8b5c9327ab2dae6da05d0752eb2f4771df2283680a80571ca82d710bc6ecd8f8beac67d63

Vendor states this is fixed in 39f2032096715daae5f6fd0f587ca7a474b019df (fixed)

Vendor states this is fixed in a6c88e5e3a75f1e4a98ad4bc4037465ccd7925bc (fixed)

Affected range stops below 5.16, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 6.18.57 (unaffected)

Affected range stops below 6.2, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 6.6 (unaffected)

Vendor states this is fixed in 6.6.160 (unaffected)

Vendor states this is fixed in 7.2.6 (unaffected)

Vendor states this is fixed in 7.3 (unaffected)

Vendor states this is fixed in 7.3-rc1 (unaffected)