CVE-2025-37947

HIGH EPSS 10.5%
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: prevent out-of-bounds stream writes by validating *pos ksmbd_vfs_stream_write() did not validate whether the write offset (*pos) was within the bounds of the existing stream data length (v_len). If *pos was greater than or equal to v_len, this could lead to an out-of-bounds memory write. This patch adds a check to ensure *pos is less than v_len before proceeding. If the condition fails, -EINVAL is returned.

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
10.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥5.15  –  <6.1.139
linuxlinux_kernel*≥6.2  –  <6.6.91
linuxlinux_kernel*≥6.7  –  <6.12.29
linuxlinux_kernel*≥6.13  –  <6.14.7
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
debiandebian_linux11.0any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/04c8a38c60346bb5a7c49b276de7233f703ce9cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0ca6df4f40cf4c32487944aaf48319cb6c25accc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7f61da79df86fd140c7768e668ad846bfa7ec8e1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d62ba16563a86aae052f96d270b3b6f78fca154c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e6356499fd216ed6343ae0363f4c9303f02c5034
    Patch
  • github.com https://github.com/doyensec/KSMBD-CVE-2025-37947/blob/main/CVE-2025-37947.c
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/04c8a38c60346bb5a7c49b276de7233f703ce9cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0ca6df4f40cf4c32487944aaf48319cb6c25accc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7f61da79df86fd140c7768e668ad846bfa7ec8e1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d62ba16563a86aae052f96d270b3b6f78fca154c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e6356499fd216ed6343ae0363f4c9303f02c5034
    Patch