CVE-2023-53250

MEDIUM EPSS 3.3%
Published Sep 15, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.9.318  –  <4.10
linuxlinux_kernel*≥4.14.283  –  <4.15
linuxlinux_kernel*≥4.19.247  –  <4.20
linuxlinux_kernel*≥5.4.198  –  <5.5
linuxlinux_kernel*≥5.10.122  –  <5.11
linuxlinux_kernel*≥5.15.47  –  <5.15.99
linuxlinux_kernel*≥5.17.15  –  <5.18
linuxlinux_kernel*≥5.18.4  –  <6.1.16
linuxlinux_kernel*≥6.2  –  <6.2.3

References 4

  • git.kernel.org https://git.kernel.org/stable/c/18e126e97c961f7a93823795c879d7c085fe5098
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d0492d1d934642bdfd2057acc1b56f4b57be465
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b4fe158259fb5fead52ff2b55841ec5c39492604
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e851996b32264e78a10863c2ac41a8689d7b9252
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/18e126e97c961f7a93823795c879d7c085fe5098
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d0492d1d934642bdfd2057acc1b56f4b57be465
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b4fe158259fb5fead52ff2b55841ec5c39492604
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e851996b32264e78a10863c2ac41a8689d7b9252
    Patch