CVE-2023-53250

published 2025-09-15

CVE-2023-53250: In the Linux kernel, the following vulnerability has been resolved: firmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle KASAN reported a…

Priority P4 18 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

In the Linux kernel, the following vulnerability has been resolved:

firmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle

KASAN reported a null-ptr-deref error:

KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 1373 Comm: modprobe
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
RIP: 0010:dmi_sysfs_entry_release
...
Call Trace:

kobject_put
dmi_sysfs_register_handle (drivers/firmware/dmi-sysfs.c:540) dmi_sysfs
dmi_decode_table (drivers/firmware/dmi_scan.c:133)
dmi_walk (drivers/firmware/dmi_scan.c:1115)
dmi_sysfs_init (drivers/firmware/dmi-sysfs.c:149) dmi_sysfs
do_one_initcall (init/main.c:1296)
...
Kernel panic - not syncing: Fatal exception
Kernel Offset: 0x4000000 from 0xffffffff81000000
---[ end Kernel panic - not syncing: Fatal exception ]---

It is because previous patch added kobject_put() to release the memory
which will call dmi_sysfs_entry_release() and list_del().

However, list_add_tail(entry->list) is called after the error block,
so the list_head is uninitialized and cannot be deleted.

Move error handling to after list_add_tail to fix this.

Affected

33 ranges · showing 25

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.1.20-1 (bookworm)	linux 6.1.20-1 (bookworm)
linux	linux	—	—
linux	linux	—	—
linux	linux	—	—
linux	linux	—	—
linux	linux	—	—
linux	linux	—	—
linux	linux	—	—
linux	linux	—	—
linux	linux	>= 4.14.283 < 4.15	4.15
linux	linux	>= 4.19.247 < 4.20	4.20
linux	linux	>= 4.9.318 < 4.10	4.10
linux	linux	>= 5.10.122 < 5.11	5.11
linux	linux	>= 5.15.47 < 5.15.99	5.15.99
linux	linux	>= 5.17.15 < 5.18	5.18
linux	linux	>= 5.18.4 < 5.19	5.19
linux	linux	>= 5.4.198 < 5.5	5.5
linux	linux	>= 660ba678f9998aca6db74f2dd912fa5124f0fa31 < e851996b32264e78a10863c2ac41a8689d7b9252	e851996b32264e78a10863c2ac41a8689d7b9252
linux	linux	>= 660ba678f9998aca6db74f2dd912fa5124f0fa31 < 5d0492d1d934642bdfd2057acc1b56f4b57be465	5d0492d1d934642bdfd2057acc1b56f4b57be465
linux	linux	>= 660ba678f9998aca6db74f2dd912fa5124f0fa31 < 18e126e97c961f7a93823795c879d7c085fe5098	18e126e97c961f7a93823795c879d7c085fe5098
linux	linux	>= fdffa4ad8f6bf1ece877edfb807f2b2c729d8578 < b4fe158259fb5fead52ff2b55841ec5c39492604	b4fe158259fb5fead52ff2b55841ec5c39492604
linux	linux_kernel	>= 0 < 6.1.20-1	6.1.20-1
linux	linux_kernel	>= 0 < 6.1.20-1	6.1.20-1
linux	linux_kernel	>= 0 < 6.1.20-1	6.1.20-1
linux	linux_kernel	>= 4.14.283 < 4.15	4.15

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 MEDIUM

vendor_redhat 5.5 MEDIUM

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