Vulnerability Database

309,540

Total vulnerabilities in the database

CVE-2025-37787

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.

  • Published: May 1, 2025
  • Updated: Nov 4, 2025
  • CVE: CVE-2025-37787
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 5.5
  • AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWEs:

Software From Fixed in
linux / linux_kernel 5.13 5.15.181
linux / linux_kernel 5.16 6.1.135
linux / linux_kernel 6.2 6.6.88
linux / linux_kernel 6.7 6.12.25
linux / linux_kernel 6.13 6.14.4
linux / linux_kernel 6.15-rc1 6.15-rc1.x
linux / linux_kernel 6.15-rc2 6.15-rc2.x