CVE-2026-31537
MEDIUMsmb: server: make use of smbdirect_socket.send_io.bcredits
Title source: cnaDescription
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