What’s Vulnerable › Vulnerabilities

CVE-2026-90166: smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request() See the procedure below: ksmbd_tree_conn_connect ksmbd_share_config_get share->name = kstrdup() // fail if (!test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) // false // do not check `share->name` ksmbd_ipc_tree_connect_request strlen(share->name) // null-ptr-deref

Affected products

• Linux: 5.15 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4eb74a34ea401abfbbd5991076715dae3de938df
• https://git.kernel.org/stable/c/5ffd180307a5ea34dae7f90ff9573ebed6b7fb12
• https://git.kernel.org/stable/c/7065d3648b1a48d2c49da3d6364dd3c4d503b10c
• https://git.kernel.org/stable/c/8461f27902727ad434375caf13a0100aafc0340f
• https://git.kernel.org/stable/c/d2ccf905f47d2344270749f4dfa905afcd3edeb0
• https://git.kernel.org/stable/c/d601be98c9445894c759c28d4a7a52151387f1fb

Get alerted when CVE-2026-90166 or the next vulnerability affects your stack