CVE-2026-31539

HIGH EPSS 34.2%
Published Apr 24, 20262mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
34.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel*≥6.18  –  <6.18.11
linuxlinux_kernel*≥6.19  –  <6.19.1

References 3

  • git.kernel.org https://git.kernel.org/stable/c/6e3c5052f9686192e178806e017b7377155f4bab
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e811e60e1cc79923c4388146eb1fa26a7482731e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f99996870222b598914a1f49d7375dc23752c237
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/6e3c5052f9686192e178806e017b7377155f4bab
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e811e60e1cc79923c4388146eb1fa26a7482731e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f99996870222b598914a1f49d7375dc23752c237
    Patch