High severity8.8NVD Advisory· Published Apr 6, 2026· Updated Jun 1, 2026
CVE-2026-31409
CVE-2026-31409
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: unset conn->binding on failed binding request
When a multichannel SMB2_SESSION_SETUP request with SMB2_SESSION_REQ_FLAG_BINDING fails ksmbd sets conn->binding = true but never clears it on the error path. This leaves the connection in a binding state where all subsequent ksmbd_session_lookup_all() calls fall back to the global sessions table. This fix it by clearing conn->binding = false in the error path.
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Affected products
2Patches
Vulnerability mechanics
References
7- git.kernel.org/stable/c/282343cf8a4a5a3603b1cb0e17a7083e4a593b03nvdPatch
- git.kernel.org/stable/c/6260fc85ed1298a71d24a75d01f8b2e56d489a60nvdPatch
- git.kernel.org/stable/c/6ebef4a220a1ebe345de899ebb9ae394206fe921nvdPatch
- git.kernel.org/stable/c/89afe5e2dbea6e9d8e5f11324149d06fa3a4efcanvdPatch
- git.kernel.org/stable/c/9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772nvdPatch
- git.kernel.org/stable/c/d073870dab8f6dadced81d13d273ff0b21cb7f4envdPatch
- git.kernel.org/stable/c/7e8b270813079c785696bce8802a3f920665c88cnvd
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