CVSS 4.7 · Medium EPSS 0,17%
Kerentanan Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') pada linux kernel. Skor CVSS 3.1 4.7 (Medium) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: configfs: fix a race in configfs_{,un}register_subsystem() When configfs_register_subsystem() or configfs_unregister_subsystem() is executing link_group() or unlink_group(), it is possible that two processes add or delete list concurrently. Some unfortunate interleavings of them can cause kernel panic. One of cases is: A --> B --> C --> D A <-- B <-- C <-- D delete list_head *B | delete list_head *C --------------------------------|----------------------------------- configfs_unregister_subsystem | configfs_unregister_subsystem unlink_group | unlink_group unlink_obj | unlink_obj list_del_init | list_del_init __list_del_entry | __list_del_entry __list_del | __list_del // next == C | next->prev = prev | | next->prev = prev prev->next = next | | // prev == B | prev->next = next Fix this by adding mutex when calling link_group() or unlink_group(), but parent configfs_subsystem is NULL when config_item is root. So I create a mutex configfs_subsystem_mutex.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 2.6.16 hingga sebelum 4.9.304 |
| linux | linux kernel | Versi 4.10 hingga sebelum 4.14.269 |
| linux | linux kernel | Versi 4.15 hingga sebelum 4.19.232 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.182 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.103 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.26 |
| linux | linux kernel | Versi 5.16 hingga sebelum 5.16.12 |