cbcvebase.
CVE-2025-37787
published 2025-05-01

CVE-2025-37787: In the Linux kernel, the following vulnerability has been resolved: net: dsa: mv88e6xxx: avoid unregistering devlink regions which were never registered…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.18%
7.3th percentile
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.

Affected

32 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.135-1 (bookworm)linux 6.1.135-1 (bookworm)
debianlinux-6.1< linux 6.1.135-1 (bookworm)linux 6.1.135-1 (bookworm)
linuxlinux
linuxlinux>= 836021a2d0e0e4c90b895a35bd9c0342071855fb < 8ccdf5e24b276848eefb2755e05ff0f005a0c4a18ccdf5e24b276848eefb2755e05ff0f005a0c4a1
linuxlinux>= 836021a2d0e0e4c90b895a35bd9c0342071855fb < b3c70dfe51f10df60db2646c08cebd24bcdc5247b3c70dfe51f10df60db2646c08cebd24bcdc5247
linuxlinux>= 836021a2d0e0e4c90b895a35bd9c0342071855fb < bbb80f004f7a90c3dcaacc982c59967457254a05bbb80f004f7a90c3dcaacc982c59967457254a05
linuxlinux>= 836021a2d0e0e4c90b895a35bd9c0342071855fb < 3665695e3572239dc233216f06b41f40cc7718893665695e3572239dc233216f06b41f40cc771889
linuxlinux>= 836021a2d0e0e4c90b895a35bd9c0342071855fb < 5f5e95945bb1e08be7655da6acba648274db457d5f5e95945bb1e08be7655da6acba648274db457d
linuxlinux>= 836021a2d0e0e4c90b895a35bd9c0342071855fb < c84f6ce918a9e6f4996597cbc62536bbf2247c96c84f6ce918a9e6f4996597cbc62536bbf2247c96
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.1.135-16.1.135-1
linuxlinux_kernel>= 0 < 6.12.25-16.12.25-1
linuxlinux_kernel>= 0 < 6.12.25-16.12.25-1
linuxlinux_kernel>= 0 < 5.15.0-144.1575.15.0-144.157
linuxlinux_kernel>= 0 < 6.8.0-100.1006.8.0-100.100
linuxlinux_kernel>= 0 < 6.14.0-22.226.14.0-22.22
linuxlinux_kernel>= 5.13 < 5.15.1815.15.181
linuxlinux_kernel>= 5.16 < 6.1.1356.1.135
linuxlinux_kernel>= 6.13 < 6.14.46.14.4
linuxlinux_kernel>= 6.2 < 6.6.886.6.88
linuxlinux_kernel>= 6.7 < 6.12.256.12.25
msrcazl3_kernel_6.6.85.1-4_on_azure_linux_3.0
msrcazl3_kernel_6.6.92.2-1_on_azure_linux_3.0
ubuntulinux-aws
ubuntulinux-aws-6.8

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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