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/Z_lRkMlTJ1KQ0kVX@shell.armlinux.org.uk/ 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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

No data.

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/3665695e3572239dc233216f06b41f40cc771889 cve-icon cve-icon
https://git.kernel.org/stable/c/5f5e95945bb1e08be7655da6acba648274db457d cve-icon cve-icon
https://git.kernel.org/stable/c/8ccdf5e24b276848eefb2755e05ff0f005a0c4a1 cve-icon cve-icon
https://git.kernel.org/stable/c/b3c70dfe51f10df60db2646c08cebd24bcdc5247 cve-icon cve-icon
https://git.kernel.org/stable/c/bbb80f004f7a90c3dcaacc982c59967457254a05 cve-icon cve-icon
https://git.kernel.org/stable/c/c84f6ce918a9e6f4996597cbc62536bbf2247c96 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025050119-CVE-2025-37787-746d@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-37787 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-37787 cve-icon
History

Fri, 02 May 2025 14:45:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Fri, 02 May 2025 06:30:00 +0000

Type Values Removed Values Added
References

Thu, 01 May 2025 13:30:00 +0000

Type Values Removed Values 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/Z_lRkMlTJ1KQ0kVX@shell.armlinux.org.uk/ 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.
Title net: dsa: mv88e6xxx: avoid unregistering devlink regions which were never registered
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-05-01T13:07:21.593Z

Updated: 2025-05-02T06:16:26.935Z

Reserved: 2025-04-16T04:51:23.940Z

Link: CVE-2025-37787

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-05-01T14:15:43.040

Modified: 2025-05-02T13:53:20.943

Link: CVE-2025-37787

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-05-01T00:00:00Z

Links: CVE-2025-37787 - Bugzilla