CVSS 5.5 · Medium EPSS 0,15%
Kerentanan NULL Pointer Dereference pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.
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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 4.9.318 hingga sebelum 4.10 |
| linux | linux kernel | Versi 4.14.283 hingga sebelum 4.15 |
| linux | linux kernel | Versi 4.19.247 hingga sebelum 4.20 |
| linux | linux kernel | Versi 5.4.198 hingga sebelum 5.5 |
| linux | linux kernel | Versi 5.10.122 hingga sebelum 5.11 |
| linux | linux kernel | Versi 5.15.47 hingga sebelum 5.15.99 |
| linux | linux kernel | Versi 5.17.15 hingga sebelum 5.18 |
| linux | linux kernel | Versi 5.18.4 hingga sebelum 6.1.16 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.2.3 |