1. Home
  2. Vulnerabilities
  3. CVE-2025-37787
5.5
MEDIUM CVSS 3.1
CVE-2025-37787
net: dsa: mv88e6xxx: avoid unregistering devlink regions which were never registered
Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: mv88e6xxx: avoid unregistering devlink regions which were never registered Russell King reports that a system with mv88e6xxx dereferences a NULL pointer when unbinding this driver: https://lore.kernel.org/netdev/[email protected]/ The crash seems to be in devlink_region_destroy(), which is not NULL tolerant but is given a NULL devlink global region pointer. At least on some chips, some devlink regions are conditionally registered since the blamed commit, see mv88e6xxx_setup_devlink_regions_global(): if (cond && !cond(chip)) continue; These are MV88E6XXX_REGION_STU and MV88E6XXX_REGION_PVT. If the chip does not have an STU or PVT, it should crash like this. To fix the issue, avoid unregistering those regions which are NULL, i.e. were skipped at mv88e6xxx_setup_devlink_regions_global() time.

INFO

Published Date :

May 1, 2025, 2:15 p.m.

Last Modified :

Nov. 3, 2025, 8:18 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-37787 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
Solution
Update the Linux kernel to a version that includes the fix for the dereferencing issue.
  • Update the Linux kernel to the latest stable version.
  • Apply the provided patch to the kernel source.
  • Recompile and install the updated kernel.
  • Reboot the system to load the new kernel.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-37787.

URL Resource
https://git.kernel.org/stable/c/3665695e3572239dc233216f06b41f40cc771889 Patch
https://git.kernel.org/stable/c/5f5e95945bb1e08be7655da6acba648274db457d Patch
https://git.kernel.org/stable/c/8ccdf5e24b276848eefb2755e05ff0f005a0c4a1 Patch
https://git.kernel.org/stable/c/b3c70dfe51f10df60db2646c08cebd24bcdc5247 Patch
https://git.kernel.org/stable/c/bbb80f004f7a90c3dcaacc982c59967457254a05 Patch
https://git.kernel.org/stable/c/c84f6ce918a9e6f4996597cbc62536bbf2247c96 Patch
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-37787 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-37787 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-37787 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-37787 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 03, 2025

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
  • Initial Analysis by [email protected]

    Oct. 31, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-476
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.88 *cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.135 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.25 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.14.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.13 up to (excluding) 5.15.181
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/3665695e3572239dc233216f06b41f40cc771889 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/5f5e95945bb1e08be7655da6acba648274db457d Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/8ccdf5e24b276848eefb2755e05ff0f005a0c4a1 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/b3c70dfe51f10df60db2646c08cebd24bcdc5247 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/bbb80f004f7a90c3dcaacc982c59967457254a05 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/c84f6ce918a9e6f4996597cbc62536bbf2247c96 Types: Patch
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 02, 2025

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/8ccdf5e24b276848eefb2755e05ff0f005a0c4a1
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 01, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: net: dsa: mv88e6xxx: avoid unregistering devlink regions which were never registered Russell King reports that a system with mv88e6xxx dereferences a NULL pointer when unbinding this driver: https://lore.kernel.org/netdev/[email protected]/ The crash seems to be in devlink_region_destroy(), which is not NULL tolerant but is given a NULL devlink global region pointer. At least on some chips, some devlink regions are conditionally registered since the blamed commit, see mv88e6xxx_setup_devlink_regions_global(): if (cond && !cond(chip)) continue; These are MV88E6XXX_REGION_STU and MV88E6XXX_REGION_PVT. If the chip does not have an STU or PVT, it should crash like this. To fix the issue, avoid unregistering those regions which are NULL, i.e. were skipped at mv88e6xxx_setup_devlink_regions_global() time.
    Added Reference https://git.kernel.org/stable/c/3665695e3572239dc233216f06b41f40cc771889
    Added Reference https://git.kernel.org/stable/c/5f5e95945bb1e08be7655da6acba648274db457d
    Added Reference https://git.kernel.org/stable/c/b3c70dfe51f10df60db2646c08cebd24bcdc5247
    Added Reference https://git.kernel.org/stable/c/bbb80f004f7a90c3dcaacc982c59967457254a05
    Added Reference https://git.kernel.org/stable/c/c84f6ce918a9e6f4996597cbc62536bbf2247c96
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact