CVE-2025-37899

HIGH EPSS 27.5%
Published May 20, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published May 20, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in session logoff The sess->user object can currently be in use by another thread, for example if another connection has sent a session setup request to bind to the session being free'd. The handler for that connection could be in the smb2_sess_setup function which makes use of sess->user.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
27.5% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥5.15  –  <6.12.28
linuxlinux_kernel*≥6.13  –  <6.14.6
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/02d16046cd11a5c037b28c12ffb818c56dd3ef43
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2fc9feff45d92a92cd5f96487655d5be23fb7e2b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70ad6455139e26e85f48f95d0e21f351c1909342
  • git.kernel.org https://git.kernel.org/stable/c/931dc8a3670f71c45c0b1379ea4e92dafbda1aca
  • git.kernel.org https://git.kernel.org/stable/c/d5ec1d79509b3ee01de02c236f096bc050221b7f
    Patch
  • news.ycombinator.com https://news.ycombinator.com/item?id=44081338
    ExploitIssue TrackingThird Party Advisory
  • sean.heelan.io https://sean.heelan.io/2025/05/22/how-i-used-o3-to-find-cve-2025-37899-a-remote-zeroday-vulnerability-in-the-linux-kernels-smb-implementation/
    ExploitThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/02d16046cd11a5c037b28c12ffb818c56dd3ef43
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2fc9feff45d92a92cd5f96487655d5be23fb7e2b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d5ec1d79509b3ee01de02c236f096bc050221b7f
    Patch