NULL Pointer Dereference Affecting cluster-md-kmp-default package, versions <5.14.21-150400.24.179.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.03% (7th percentile)

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  • Snyk IDSNYK-SLES154-CLUSTERMDKMPDEFAULT-13624628
  • published18 Oct 2025
  • disclosed17 Oct 2025

Introduced: 17 Oct 2025

CVE-2023-53250  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 cluster-md-kmp-default to version 5.14.21-150400.24.179.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cluster-md-kmp-default package and not the cluster-md-kmp-default package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

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 Base Scores

version 3.1