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.

References

• https://git.kernel.org/stable/c/282343cf8a4a5a3603b1cb0e17a7083e4a593b03
• https://git.kernel.org/stable/c/6260fc85ed1298a71d24a75d01f8b2e56d489a60
• https://git.kernel.org/stable/c/6ebef4a220a1ebe345de899ebb9ae394206fe921
• https://git.kernel.org/stable/c/89afe5e2dbea6e9d8e5f11324149d06fa3a4efca
• https://git.kernel.org/stable/c/9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772