CVE-2026-31409

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.

Score

CVSS 3.1 8.8 High

Status

Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-04-06

Last modified

2026-08-05

Affected products

• Linux Kernel (Linux)

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/7e8b270813079c785696bce8802a3f920665c88c
• https://git.kernel.org/stable/c/89afe5e2dbea6e9d8e5f11324149d06fa3a4efca
• https://git.kernel.org/stable/c/9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772
• https://git.kernel.org/stable/c/d073870dab8f6dadced81d13d273ff0b21cb7f4e