CVE-2026-31409
ksmbd: unset conn->binding on failed binding request
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 6, 2026 |
| Last Updated | Jun 1, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
f5a544e3bab78142207e0242d22442db85ba1eff < 7e8b270813079c785696bce8802a3f920665c88c f5a544e3bab78142207e0242d22442db85ba1eff < d073870dab8f6dadced81d13d273ff0b21cb7f4e f5a544e3bab78142207e0242d22442db85ba1eff < 6ebef4a220a1ebe345de899ebb9ae394206fe921 f5a544e3bab78142207e0242d22442db85ba1eff < 89afe5e2dbea6e9d8e5f11324149d06fa3a4efca f5a544e3bab78142207e0242d22442db85ba1eff < 9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772 f5a544e3bab78142207e0242d22442db85ba1eff < 6260fc85ed1298a71d24a75d01f8b2e56d489a60 f5a544e3bab78142207e0242d22442db85ba1eff < 282343cf8a4a5a3603b1cb0e17a7083e4a593b03
Linux / Linux
5.15
References
git.kernel.org: https://git.kernel.org/stable/c/7e8b270813079c785696bce8802a3f920665c88c git.kernel.org: https://git.kernel.org/stable/c/d073870dab8f6dadced81d13d273ff0b21cb7f4e git.kernel.org: https://git.kernel.org/stable/c/6ebef4a220a1ebe345de899ebb9ae394206fe921 git.kernel.org: https://git.kernel.org/stable/c/89afe5e2dbea6e9d8e5f11324149d06fa3a4efca git.kernel.org: https://git.kernel.org/stable/c/9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772 git.kernel.org: https://git.kernel.org/stable/c/6260fc85ed1298a71d24a75d01f8b2e56d489a60 git.kernel.org: https://git.kernel.org/stable/c/282343cf8a4a5a3603b1cb0e17a7083e4a593b03