CVE-2026-31539

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-31539

Key Details

CVE	CVE-2026-31539
CVSS Score / Version	7.5 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is none; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available

The logic off managing recv credits by counting posted recv_io and

granted credits is racy.

That's because the peer might already consumed a credit,

but between receiving the incoming recv at the hardware

and processing the completion in the 'recv_done' functions

we likely have a window where we grant credits, which

don't really exist.

So we better have a decicated counter for the

available credits, which will be incremented

when we posted new recv buffers and drained when

we grant the credits to the peer. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-31539
CVE	https://www.cve.org/CVERecord?id=CVE-2026-31539

Source

Reference

NVD

CVE