In the Linux kernel, the following vulnerability has been resolved:
ksmbd: do not expire session on binding failure
When a multichannel session binding request fails (e.g. wrong password),
the error path unconditionally sets sess->state = SMB2_SESSION_EXPIRED.
However, during binding, sess points to the target session looked up via
ksmbd_session_lookup_slowpath() -- which belongs to another connection's
user. This allows a remote attacker to invalidate any active session by
simply sending a binding request with a wrong password (DoS).
Fix this by skipping session expiration when the failed request was
a binding attempt, since the session does not belong to the current
connection. The reference taken by ksmbd_session_lookup_slowpath() is
still correctly released via ksmbd_user_session_put().
References
Configurations
Configuration 1 (hide)
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History
01 Jun 2026, 17:16
| Type | Values Removed | Values Added |
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| References |
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27 Apr 2026, 23:25
| Type | Values Removed | Values Added |
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| CPE | cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* |
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| References | () https://git.kernel.org/stable/c/1d1888b4a7aec518b707f6eca0bf08992c0e8da3 - Patch | |
| References | () https://git.kernel.org/stable/c/6fafc4c4238e538969f1375f9ecdc6587c53f1cc - Patch | |
| References | () https://git.kernel.org/stable/c/9bbb19d21ded7d78645506f20d8c44895e3d0fb9 - Patch | |
| References | () https://git.kernel.org/stable/c/a897064a457056acb976e20e3007cdf553de340f - Patch | |
| References | () https://git.kernel.org/stable/c/e0e5edc81b241c70355217de7e120c97c3429deb - Patch | |
| References | () https://git.kernel.org/stable/c/f5300690c23c5ac860499bb37dbc09cf43fd62e6 - Patch | |
| First Time |
Linux
Linux linux Kernel |
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| CWE | NVD-CWE-noinfo |
27 Apr 2026, 14:16
| Type | Values Removed | Values Added |
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| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.2 |
22 Apr 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-22 14:16
Updated : 2026-06-01 17:16
NVD link : CVE-2026-31476
Mitre link : CVE-2026-31476
CVE.ORG link : CVE-2026-31476
JSON object : View
Products Affected
linux
- linux_kernel
CWE