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Vulnerability details: VCID-8xay-cepn-vfdd
Vulnerability ID VCID-8xay-cepn-vfdd
Aliases CVE-2026-31476
Summary 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().
Status Published
Exploitability 0.5
Weighted Severity 2.8
Risk 1.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-274 Improper Handling of Insufficient Privileges
System Score Found at
epss 0.00076 https://api.first.org/data/v1/epss?cve=CVE-2026-31476
epss 0.00076 https://api.first.org/data/v1/epss?cve=CVE-2026-31476
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2026-31476
cvssv3.1 5.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-31476.json
https://api.first.org/data/v1/epss?cve=CVE-2026-31476
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-31476
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2460626 https://bugzilla.redhat.com/show_bug.cgi?id=2460626
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.22561
EPSS Score 0.00076
Published At April 24, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-23T05:41:02.029863+00:00 Debian Importer Import https://security-tracker.debian.org/tracker/data/json 38.4.0