CVE-2026-31539
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
24/04/2026
Last modified:
28/04/2026
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available<br />
<br />
The logic off managing recv credits by counting posted recv_io and<br />
granted credits is racy.<br />
<br />
That&#39;s because the peer might already consumed a credit,<br />
but between receiving the incoming recv at the hardware<br />
and processing the completion in the &#39;recv_done&#39; functions<br />
we likely have a window where we grant credits, which<br />
don&#39;t really exist.<br />
<br />
So we better have a decicated counter for the<br />
available credits, which will be incremented<br />
when we posted new recv buffers and drained when<br />
we grant the credits to the peer.
Impact
Base Score 3.x
7.50
Severity 3.x
HIGH
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.18 (including) | 6.18.11 (excluding) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.19 (including) | 6.19.1 (excluding) |
To consult the complete list of CPE names with products and versions, see this page