ghsa-m84q-m2jg-26h3
Vulnerability from github
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": [],
"aliases": [
"CVE-2023-53250"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-15T15:15:52Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle\n\nKASAN reported a null-ptr-deref error:\n\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 PID: 1373 Comm: modprobe\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nRIP: 0010:dmi_sysfs_entry_release\n...\nCall Trace:\n \u003cTASK\u003e\n kobject_put\n dmi_sysfs_register_handle (drivers/firmware/dmi-sysfs.c:540) dmi_sysfs\n dmi_decode_table (drivers/firmware/dmi_scan.c:133)\n dmi_walk (drivers/firmware/dmi_scan.c:1115)\n dmi_sysfs_init (drivers/firmware/dmi-sysfs.c:149) dmi_sysfs\n do_one_initcall (init/main.c:1296)\n ...\nKernel panic - not syncing: Fatal exception\nKernel Offset: 0x4000000 from 0xffffffff81000000\n---[ end Kernel panic - not syncing: Fatal exception ]---\n\nIt is because previous patch added kobject_put() to release the memory\nwhich will call dmi_sysfs_entry_release() and list_del().\n\nHowever, list_add_tail(entry-\u003elist) is called after the error block,\nso the list_head is uninitialized and cannot be deleted.\n\nMove error handling to after list_add_tail to fix this.",
"id": "GHSA-m84q-m2jg-26h3",
"modified": "2025-09-15T15:31:30Z",
"published": "2025-09-15T15:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53250"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/18e126e97c961f7a93823795c879d7c085fe5098"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5d0492d1d934642bdfd2057acc1b56f4b57be465"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b4fe158259fb5fead52ff2b55841ec5c39492604"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e851996b32264e78a10863c2ac41a8689d7b9252"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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