CVE - CVE-2022-48931

CVE-ID
CVE-2022-48931	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/3aadfd46858b1f64d4d6a0654b863e21aabff975 URL:https://git.kernel.org/stable/c/3aadfd46858b1f64d4d6a0654b863e21aabff975 MISC:https://git.kernel.org/stable/c/40805099af11f68c5ca7dbcfacf455da8f99f622 URL:https://git.kernel.org/stable/c/40805099af11f68c5ca7dbcfacf455da8f99f622 MISC:https://git.kernel.org/stable/c/84ec758fb2daa236026506868c8796b0500c047d URL:https://git.kernel.org/stable/c/84ec758fb2daa236026506868c8796b0500c047d MISC:https://git.kernel.org/stable/c/a37024f7757c25550accdebf49e497ad6ae239fe URL:https://git.kernel.org/stable/c/a37024f7757c25550accdebf49e497ad6ae239fe MISC:https://git.kernel.org/stable/c/a7ab53d3c27dfe83bb594456b9f38a37796ec39b URL:https://git.kernel.org/stable/c/a7ab53d3c27dfe83bb594456b9f38a37796ec39b MISC:https://git.kernel.org/stable/c/b7e2b91fcb5c78c414e33dc8d50642e307ca0c5a URL:https://git.kernel.org/stable/c/b7e2b91fcb5c78c414e33dc8d50642e307ca0c5a MISC:https://git.kernel.org/stable/c/d1654de19d42f513b6cfe955cc77e7f427e05a77 URL:https://git.kernel.org/stable/c/d1654de19d42f513b6cfe955cc77e7f427e05a77 MISC:https://git.kernel.org/stable/c/e7a66dd2687758718eddd79b542a95cf3aa488cc URL:https://git.kernel.org/stable/c/e7a66dd2687758718eddd79b542a95cf3aa488cc
Assigning CNA
kernel.org
Date Record Created
20240821	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240821)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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