What is the CVSS score of CVE-2025-37947?

CVE-2025-37947 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Debian Linux are affected by CVE-2025-37947?

CVE-2025-37947 presents notable security risk, a out-of-bounds write vulnerability rated CVSS 7.8.. A patch is available.

How to fix or mitigate CVE-2025-37947?

Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

Debian Linux CVE-2025-37947

HIGH

Out-of-bounds Write (CWE-787)

2025-05-20 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Buffer Overflow Linux Memory Corruption Debian Debian Linux

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SUSE

HIGH

qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 17, 2026 - 20:45 vuln.today

Patch released

Mar 17, 2026 - 20:45 nvd

Patch available

CVE Published

May 20, 2025 - 16:15 nvd

HIGH 7.8

DescriptionNVD

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.

AnalysisAI

A boundary validation vulnerability in the Linux kernel's ksmbd (in-kernel SMB server) allows authenticated local users to perform out-of-bounds memory writes when handling stream data operations. The flaw occurs when write offsets exceed existing stream data boundaries, potentially leading to memory corruption with high impact on system confidentiality, integrity, and availability (CVSS 7.8). A proof-of-concept exploit is publicly available on GitHub, though real-world exploitation probability remains low at 0.03% according to EPSS data.

Technical ContextAI

The vulnerability affects ksmbd, the Linux kernel's built-in SMB/CIFS server implementation that allows Linux systems to serve files to Windows clients. The flaw resides in the ksmbd_vfs_stream_write() function which failed to validate whether the write offset position (*pos) was within bounds of the existing stream data length (v_len). This represents a classic CWE-787 out-of-bounds write vulnerability where boundary checks are missing before memory operations. Based on CPE data, the vulnerability affects Linux kernel versions up through 6.15-rc5 across multiple branches, including the stable 5.15.x, 6.1.x, 6.6.x, and 6.11.x series, as well as Debian Linux 11.0.

RemediationAI

Update the Linux kernel to the patched versions: 5.15.177 or later for the 5.15.x branch, 6.1.123 or later for 6.1.x, 6.6.69 or later for 6.6.x, or 6.11.12 or later for 6.11.x. Debian 11 users should apply the update referenced in the Debian LTS announcement at https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html. As a temporary mitigation, disable ksmbd if SMB file sharing is not required, or restrict local access to trusted users only. The vendor patches are available through the kernel.org Git repositories linked in the references.

More in Debian Linux

View all

CVE-2021-44228 CRITICAL Act Now POC

10.0 Dec 10

Apache Log4j2 contains a critical JNDI injection vulnerability known as 'Log4Shell' that allows unauthenticated remote c

CVE-2019-11043 CRITICAL Emergency POC

9.8 Oct 28

In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it

CVE-2012-1823 CRITICAL Act Now POC

9.8 May 11

sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not

CVE-2014-6271 CRITICAL Act Now POC

9.8 Sep 24

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which

CVE-2017-7494 CRITICAL Act Now POC

9.8 May 30

Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allo

CVE-2012-0507 CRITICAL Emergency POC

9.8 Jun 07

Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 2 and earlier, 6 Up

CVE-2025-49113 CRITICAL Act Now POC

9.9 Jun 02

Roundcube Webmail contains a critical PHP object deserialization vulnerability (CVE-2025-49113, CVSS 9.9) that allows au

CVE-2022-30333 HIGH Act Now POC

7.5 May 09

RARLAB UnRAR before 6.12 on Linux and UNIX allows directory traversal to write to files during an extract (aka unpack) o

CVE-2016-3714 HIGH Act Now POC

8.4 May 05

The (1) EPHEMERAL, (2) HTTPS, (3) MVG, (4) MSL, (5) TEXT, (6) SHOW, (7) WIN, and (8) PLT coders in ImageMagick before 6.

CVE-2017-12617 HIGH Act Now POC

8.1 Oct 04

When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTT

CVE-2020-1938 CRITICAL Act Now POC

9.8 Feb 24

When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to Apache Tomcat. Rate

CVE-2018-7602 CRITICAL Act Now POC

9.8 Jul 19

A remote code execution vulnerability exists within multiple subsystems of Drupal 7.x and 8.x. Rated critical severity (

Same weakness CWE-787 – Out-of-bounds Write

View all

CVE-2015-3113 CRITICAL POC

9.8

CVE-2011-2462 CRITICAL POC

9.8

CVE-2012-1889 HIGH POC

8.8

CVE-2010-3333 HIGH POC

7.8

CVE-2014-1761 HIGH POC

7.8

CVE-2009-3129 HIGH POC

7.8

CVE-2021-1732 HIGH POC

7.8

CVE-2013-3346 CRITICAL POC

9.8

Same technique Buffer Overflow

View all

CVE-2017-7269 CRITICAL POC

9.8

CVE-2015-5119 CRITICAL POC

9.8

CVE-2015-3113 CRITICAL POC

9.8

CVE-2011-2462 CRITICAL POC

9.8

CVE-2020-0796 CRITICAL POC

10.0

CVE-2019-11043 CRITICAL POC

9.8

CVE-2009-0927 HIGH POC

8.8

CVE-2012-1889 HIGH POC

8.8

Vendor StatusVendor

SUSE

Severity: High

Product	Status
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7	Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7	Fixed

CVE-2025-37947 vulnerability details – vuln.today

Back

Debian Linux CVE-2025-37947

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

Technical ContextAI

RemediationAI

More in Debian Linux

Same weakness CWE-787 – Out-of-bounds Write

Same technique Buffer Overflow

Vendor StatusVendor

SUSE

Share

External POC / Exploit Code