CVE-2026-31536 Details
Description
In the Linux kernel, the following vulnerability has been resolved: smb: server: let send_done handle a completion without IB_SEND_SIGNALED With smbdirect_send_batch processing we likely have requests without IB_SEND_SIGNALED, which will be destroyed in the final request that has IB_SEND_SIGNALED set. If the connection is broken all requests are signaled even without explicit IB_SEND_SIGNALED.
A vulnerability has been identified in the Linux kernel's SMB server component, specifically in versions 6.18.x. This issue arises in the 'send_done' function, where the completion of send operations is not properly managed when the 'IB_SEND_SIGNALED' flag is absent. This situation can occur during 'smbdirect_send_batch' processing, leading to potential memory management problems. When a connection is disrupted, all requests are signaled, even if 'IB_SEND_SIGNALED' was not explicitly set, which can cause unintended consequences.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/24082642654f3e5149913946e89c00a297a8868f | kernel.org | Patch |
| https://git.kernel.org/stable/c/9da82dc73cb03e85d716a2609364572367a5ff47 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e38b415c024bc3b6321bf8650dbf3f4aab8e74b3 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.15, < 6.18.11 >= 6.19, < 6.19.1 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Apr 28, 2026 | Initial Analysis | [email protected] |
| Apr 27, 2026 | CVE Modified | kernel.org |
| Apr 24, 2026 | New CVE Received | kernel.org |