CVE-2026-31409
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f5a544e3bab78142207e0242d22442db85ba1eff < 7e8b270813079c785696bce8802a3f920665c88c | affected |
| Linux | Linux | f5a544e3bab78142207e0242d22442db85ba1eff < d073870dab8f6dadced81d13d273ff0b21cb7f4e | affected |
| Linux | Linux | f5a544e3bab78142207e0242d22442db85ba1eff < 6ebef4a220a1ebe345de899ebb9ae394206fe921 | affected |
| Linux | Linux | f5a544e3bab78142207e0242d22442db85ba1eff < 89afe5e2dbea6e9d8e5f11324149d06fa3a4efca | affected |
| Linux | Linux | f5a544e3bab78142207e0242d22442db85ba1eff < 9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772 | affected |
| Linux | Linux | f5a544e3bab78142207e0242d22442db85ba1eff < 6260fc85ed1298a71d24a75d01f8b2e56d489a60 | affected |
| Linux | Linux | f5a544e3bab78142207e0242d22442db85ba1eff < 282343cf8a4a5a3603b1cb0e17a7083e4a593b03 | affected |
| Linux | Linux | 5.15 | affected |
| Linux | Linux | 0 < 5.15 | unaffected |
| Linux | Linux | 5.15.209 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.167 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.130 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.78 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.20 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.10 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/7e8b270813079c785696bce8802a3f920665c88c
- https://git.kernel.org/stable/c/d073870dab8f6dadced81d13d273ff0b21cb7f4e
- https://git.kernel.org/stable/c/6ebef4a220a1ebe345de899ebb9ae394206fe921
- https://git.kernel.org/stable/c/89afe5e2dbea6e9d8e5f11324149d06fa3a4efca
- https://git.kernel.org/stable/c/9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772
- https://git.kernel.org/stable/c/6260fc85ed1298a71d24a75d01f8b2e56d489a60
- https://git.kernel.org/stable/c/282343cf8a4a5a3603b1cb0e17a7083e4a593b03
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