cbcvebase.
CVE-2025-37905
published 2025-05-20

CVE-2025-37905: In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Balance device refcount when destroying devices Using…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.17%
6.3th percentile
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Balance device refcount when destroying devices Using device_find_child() to lookup the proper SCMI device to destroy causes an unbalance in device refcount, since device_find_child() calls an implicit get_device(): this, in turns, inhibits the call of the provided release methods upon devices destruction. As a consequence, one of the structures that is not freed properly upon destruction is the internal struct device_private dev->p populated by the drivers subsystem core. KMemleak detects this situation since loading/unloding some SCMI driver causes related devices to be created/destroyed without calling any device_release method. unreferenced object 0xffff00000f583800 (size 512): comm "insmod", pid 227, jiffies 4294912190 hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff 60 36 1d 8a 00 80 ff ff ........`6...... backtrace (crc 114e2eed): kmemleak_alloc+0xbc/0xd8 __kmalloc_cache_noprof+0x2dc/0x398 device_add+0x954/0x12d0 device_register+0x28/0x40 __scmi_device_create.part.0+0x1bc/0x380 scmi_device_create+0x2d0/0x390 scmi_create_protocol_devices+0x74/0xf8 scmi_device_request_notifier+0x1f8/0x2a8 notifier_call_chain+0x110/0x3b0 blocking_notifier_call_chain+0x70/0xb0 scmi_driver_register+0x350/0x7f0 0xffff80000a3b3038 do_one_initcall+0x12c/0x730 do_init_module+0x1dc/0x640 load_module+0x4b20/0x5b70 init_module_from_file+0xec/0x158 $ ./scripts/faddr2line ./vmlinux device_add+0x954/0x12d0 device_add+0x954/0x12d0: kmalloc_noprof at include/linux/slab.h:901 (inlined by) kzalloc_noprof at include/linux/slab.h:1037 (inlined by) device_private_init at drivers/base/core.c:3510 (inlined by) device_add at drivers/base/core.c:3561 Balance device refcount by issuing a put_device() on devices found via device_find_child().

Affected

33 ranges· showing 25
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.140-1 (bookworm)linux 6.1.140-1 (bookworm)
debianlinux-6.1< linux 6.1.140-1 (bookworm)linux 6.1.140-1 (bookworm)
linuxlinux
linuxlinux>= d4f9dddd21f39395c62ea12d3d91239637d4805f < 91ff1e9652fb9beb0174267d6bb38243dff211bb91ff1e9652fb9beb0174267d6bb38243dff211bb
linuxlinux>= d4f9dddd21f39395c62ea12d3d91239637d4805f < ff4273d47da81b95ed9396110bcbd1b7b7470fe8ff4273d47da81b95ed9396110bcbd1b7b7470fe8
linuxlinux>= d4f9dddd21f39395c62ea12d3d91239637d4805f < 2fbf6c9695ad9f05e7e5c166bf43fac7cb3276b32fbf6c9695ad9f05e7e5c166bf43fac7cb3276b3
linuxlinux>= d4f9dddd21f39395c62ea12d3d91239637d4805f < 969d8beaa2e374387bf9aa5602ef84fc50bb48d8969d8beaa2e374387bf9aa5602ef84fc50bb48d8
linuxlinux>= d4f9dddd21f39395c62ea12d3d91239637d4805f < 8a8a3547d5c4960da053df49c75bf623827a25da8a8a3547d5c4960da053df49c75bf623827a25da
linuxlinux>= d4f9dddd21f39395c62ea12d3d91239637d4805f < 9ca67840c0ddf3f39407339624cef824a4f275999ca67840c0ddf3f39407339624cef824a4f27599
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.1.140-16.1.140-1
linuxlinux_kernel>= 0 < 6.12.29-16.12.29-1
linuxlinux_kernel>= 0 < 6.12.29-16.12.29-1
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 < 6.14.0-24.246.14.0-24.24
linuxlinux_kernel>= 5.13 < 5.15.1825.15.182
linuxlinux_kernel>= 5.16 < 6.1.1386.1.138
linuxlinux_kernel>= 6.13 < 6.14.66.14.6
linuxlinux_kernel>= 6.2 < 6.6.906.6.90
linuxlinux_kernel>= 6.7 < 6.12.286.12.28
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

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_redhat5.5MEDIUM
vendor_msrc2.3LOW
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.