Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.15, < 6.1.167 |
References
- https://git.kernel.org/stable/c/282343cf8a4a5a3603b1cb0e17a7083e4a593b03Patch
- https://git.kernel.org/stable/c/6260fc85ed1298a71d24a75d01f8b2e56d489a60Patch
- https://git.kernel.org/stable/c/6ebef4a220a1ebe345de899ebb9ae394206fe921Patch
- https://git.kernel.org/stable/c/89afe5e2dbea6e9d8e5f11324149d06fa3a4efcaPatch
- https://git.kernel.org/stable/c/9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772Patch
- https://git.kernel.org/stable/c/d073870dab8f6dadced81d13d273ff0b21cb7f4ePatch
FAQ
What is CVE-2026-31409?
CVE-2026-31409 is a vulnerability with a CVSS score of 8.8 (HIGH). 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_BIN...
How severe is CVE-2026-31409?
CVE-2026-31409 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31409?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.