CVE-2023-3866
BaseFortify
Publication date: 2025-08-16
Last updated on: 2025-11-18
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | 6.4 |
| linux | linux_kernel | 6.4 |
| linux | linux_kernel | 6.4 |
| linux | linux_kernel | 6.4 |
| linux | linux_kernel | 6.4 |
| linux | linux_kernel | 6.4 |
| linux | linux_kernel | 6.4 |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-476 | The product dereferences a pointer that it expects to be valid but is NULL. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability in the Linux kernel's ksmbd component occurs because the session id and tree id are not properly validated in a compound SMB2 request. Specifically, if the first operation in the compound request is an SMB2 ECHO request, ksmbd bypasses session and tree validation, which can result in work->sess and work->tcon being NULL. If a subsequent request in the compound tries to access these NULL pointers, it causes a NULL pointer dereferencing error.
How can this vulnerability impact me? :
The vulnerability can cause a NULL pointer dereference in the ksmbd component of the Linux kernel, potentially leading to a kernel crash or denial of service. This could disrupt system availability or stability.