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CVE-2026-31409

ksmbd: unset conn->binding on failed binding request PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected f5a544e3bab78142207e0242d22442db85ba1eff before 7e8b270813079c785696bce8802a3f920665c88c; affected f5a544e3bab78142207e0242d22442db85ba1eff before d073870dab8f6dadced81d13d273ff0b21cb7f4e; affected f5a544e3bab78142207e0242d22442db85ba1eff before 6ebef4a220a1ebe345de899ebb9ae394206fe921; affected f5a544e3bab78142207e0242d22442db85ba1eff before 89afe5e2dbea6e9d8e5f11324149d06fa3a4efca; affected f5a544e3bab78142207e0242d22442db85ba1eff before 9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772; affected f5a544e3bab78142207e0242d22442db85ba1eff before 6260fc85ed1298a71d24a75d01f8b2e56d489a60; affected f5a544e3bab78142207e0242d22442db85ba1eff before 282343cf8a4a5a3603b1cb0e17a7083e4a593b03
Linux / Linuxaffected 5.15; unaffected 0 before 5.15; unaffected 5.15.209 through 5.15.*; unaffected 6.1.167 through 6.1.*; unaffected 6.6.130 through 6.6.*; unaffected 6.12.78 through 6.12.*; unaffected 6.18.20 through 6.18.*; unaffected 6.19.10 through 6.19.*; unaffected 7.0 through *

CWE

No CWE identifiers supplied.

References