CVE-2026-31537

MEDIUM

smb: server: make use of smbdirect_socket.send_io.bcredits

Title source: cna
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: smb: server: make use of smbdirect_socket.send_io.bcredits It turns out that our code will corrupt the stream of reassabled data transfer messages when we trigger an immendiate (empty) send. In order to fix this we'll have a single 'batch' credit per connection. And code getting that credit is free to use as much messages until remaining_length reaches 0, then the batch credit it given back and the next logical send can happen.

Scores

CVSS v3 5.5
EPSS 0.0001
EPSS Percentile 2.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (12)
Linux/Linux < 5.15
Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - 34abd408c8ba24d7c97bd02ba874d8c714f49db1
Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - 5ef18a2e66f2f33fdac64437bddfb9fe6389fdc7
Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - 79242e7b6bc63efec28b7c235bc320806afce6c0
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 34abd408c8ba24d7c97bd02ba874d8c714f49db1
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 5ef18a2e66f2f33fdac64437bddfb9fe6389fdc7
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 79242e7b6bc63efec28b7c235bc320806afce6c0
Linux/Linux 5.15
Linux/Linux 6.18.11 - 6.18.*
Linux/Linux 6.19.1 - 6.19.*
... and 2 more
Published Apr 24, 2026
Tracked Since Apr 24, 2026