CVE-2023-53250
Unknown
Unknown - Not Provided
BaseFortify
Publication date: 2025-09-15
Last updated on: 2025-12-03
Assigner: kernel.org
Description
Description
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:
<TASK>
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | From 4.9.318 (inc) to 4.10 (exc) |
| linux | linux_kernel | From 4.14.283 (inc) to 4.15 (exc) |
| linux | linux_kernel | From 4.19.247 (inc) to 4.20 (exc) |
| linux | linux_kernel | From 5.4.198 (inc) to 5.5 (exc) |
| linux | linux_kernel | From 5.10.122 (inc) to 5.11 (exc) |
| linux | linux_kernel | From 5.15.47 (inc) to 5.15.99 (exc) |
| linux | linux_kernel | From 5.17.15 (inc) to 5.18 (exc) |
| linux | linux_kernel | From 5.18.4 (inc) to 6.1.16 (exc) |
| linux | linux_kernel | From 6.2 (inc) to 6.2.3 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-476 | The product dereferences a pointer that it expects to be valid but is NULL. |
