CVE-2022-48931
Linux Kernel Configfs Race Condition
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.
INFO
Published Date :
Aug. 22, 2024, 4:15 a.m.
Last Modified :
Aug. 23, 2024, 1:54 a.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.0
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2022-48931
.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2022-48931
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-48931
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 23, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/3aadfd46858b1f64d4d6a0654b863e21aabff975 No Types Assigned https://git.kernel.org/stable/c/3aadfd46858b1f64d4d6a0654b863e21aabff975 Patch Changed Reference Type https://git.kernel.org/stable/c/40805099af11f68c5ca7dbcfacf455da8f99f622 No Types Assigned https://git.kernel.org/stable/c/40805099af11f68c5ca7dbcfacf455da8f99f622 Patch Changed Reference Type https://git.kernel.org/stable/c/84ec758fb2daa236026506868c8796b0500c047d No Types Assigned https://git.kernel.org/stable/c/84ec758fb2daa236026506868c8796b0500c047d Patch Changed Reference Type https://git.kernel.org/stable/c/a37024f7757c25550accdebf49e497ad6ae239fe No Types Assigned https://git.kernel.org/stable/c/a37024f7757c25550accdebf49e497ad6ae239fe Patch Changed Reference Type https://git.kernel.org/stable/c/a7ab53d3c27dfe83bb594456b9f38a37796ec39b No Types Assigned https://git.kernel.org/stable/c/a7ab53d3c27dfe83bb594456b9f38a37796ec39b Patch Changed Reference Type https://git.kernel.org/stable/c/b7e2b91fcb5c78c414e33dc8d50642e307ca0c5a No Types Assigned https://git.kernel.org/stable/c/b7e2b91fcb5c78c414e33dc8d50642e307ca0c5a Patch Changed Reference Type https://git.kernel.org/stable/c/d1654de19d42f513b6cfe955cc77e7f427e05a77 No Types Assigned https://git.kernel.org/stable/c/d1654de19d42f513b6cfe955cc77e7f427e05a77 Patch Changed Reference Type https://git.kernel.org/stable/c/e7a66dd2687758718eddd79b542a95cf3aa488cc No Types Assigned https://git.kernel.org/stable/c/e7a66dd2687758718eddd79b542a95cf3aa488cc Patch Added CWE NIST CWE-362 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.16 up to (excluding) 4.9.304 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.269 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.232 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.182 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.103 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.26 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 5.16.12 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 22, 2024
Action Type Old Value New Value Added 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. Added Reference kernel.org https://git.kernel.org/stable/c/40805099af11f68c5ca7dbcfacf455da8f99f622 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/d1654de19d42f513b6cfe955cc77e7f427e05a77 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/a37024f7757c25550accdebf49e497ad6ae239fe [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b7e2b91fcb5c78c414e33dc8d50642e307ca0c5a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/a7ab53d3c27dfe83bb594456b9f38a37796ec39b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/e7a66dd2687758718eddd79b542a95cf3aa488cc [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/3aadfd46858b1f64d4d6a0654b863e21aabff975 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/84ec758fb2daa236026506868c8796b0500c047d [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-48931
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-48931
weaknesses.