CVE-2021-47361
Linux kernel mcb bus Use After Free/Invalid Free
Description
In the Linux kernel, the following vulnerability has been resolved: mcb: fix error handling in mcb_alloc_bus() There are two bugs: 1) If ida_simple_get() fails then this code calls put_device(carrier) but we haven't yet called get_device(carrier) and probably that leads to a use after free. 2) After device_initialize() then we need to use put_device() to release the bus. This will free the internal resources tied to the device and call mcb_free_bus() which will free the rest.
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
Dec. 26, 2024, 7:45 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
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-2021-47361.
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-2021-47361 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47361 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.
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Initial Analysis by [email protected]
Dec. 26, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.7 up to (excluding) 4.9.285 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.249 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.150 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.70 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.14.9 *cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/115b07d9f47e3996430b8f2007edd9768e1f807f No Types Assigned https://git.kernel.org/stable/c/115b07d9f47e3996430b8f2007edd9768e1f807f Patch Changed Reference Type https://git.kernel.org/stable/c/115b07d9f47e3996430b8f2007edd9768e1f807f No Types Assigned https://git.kernel.org/stable/c/115b07d9f47e3996430b8f2007edd9768e1f807f Patch Changed Reference Type https://git.kernel.org/stable/c/25a1433216489de4abc889910f744e952cb6dbae No Types Assigned https://git.kernel.org/stable/c/25a1433216489de4abc889910f744e952cb6dbae Patch Changed Reference Type https://git.kernel.org/stable/c/25a1433216489de4abc889910f744e952cb6dbae No Types Assigned https://git.kernel.org/stable/c/25a1433216489de4abc889910f744e952cb6dbae Patch Changed Reference Type https://git.kernel.org/stable/c/66f74ba9be9daf9c47fface6af3677f602774f6b No Types Assigned https://git.kernel.org/stable/c/66f74ba9be9daf9c47fface6af3677f602774f6b Patch Changed Reference Type https://git.kernel.org/stable/c/66f74ba9be9daf9c47fface6af3677f602774f6b No Types Assigned https://git.kernel.org/stable/c/66f74ba9be9daf9c47fface6af3677f602774f6b Patch Changed Reference Type https://git.kernel.org/stable/c/7751f609eadf36b1f53712bae430019c53a16eb0 No Types Assigned https://git.kernel.org/stable/c/7751f609eadf36b1f53712bae430019c53a16eb0 Patch Changed Reference Type https://git.kernel.org/stable/c/7751f609eadf36b1f53712bae430019c53a16eb0 No Types Assigned https://git.kernel.org/stable/c/7751f609eadf36b1f53712bae430019c53a16eb0 Patch Changed Reference Type https://git.kernel.org/stable/c/8a558261fa57a6deefb0925ab1829f698b194aea No Types Assigned https://git.kernel.org/stable/c/8a558261fa57a6deefb0925ab1829f698b194aea Patch Changed Reference Type https://git.kernel.org/stable/c/8a558261fa57a6deefb0925ab1829f698b194aea No Types Assigned https://git.kernel.org/stable/c/8a558261fa57a6deefb0925ab1829f698b194aea Patch Changed Reference Type https://git.kernel.org/stable/c/91e4ad05bf18322b5921d1a6c9b603f6eb1694f0 No Types Assigned https://git.kernel.org/stable/c/91e4ad05bf18322b5921d1a6c9b603f6eb1694f0 Patch Changed Reference Type https://git.kernel.org/stable/c/91e4ad05bf18322b5921d1a6c9b603f6eb1694f0 No Types Assigned https://git.kernel.org/stable/c/91e4ad05bf18322b5921d1a6c9b603f6eb1694f0 Patch Changed Reference Type https://git.kernel.org/stable/c/9fc198f415dee070a1de957bb5bf5921d8df3499 No Types Assigned https://git.kernel.org/stable/c/9fc198f415dee070a1de957bb5bf5921d8df3499 Patch Changed Reference Type https://git.kernel.org/stable/c/9fc198f415dee070a1de957bb5bf5921d8df3499 No Types Assigned https://git.kernel.org/stable/c/9fc198f415dee070a1de957bb5bf5921d8df3499 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/115b07d9f47e3996430b8f2007edd9768e1f807f Added Reference https://git.kernel.org/stable/c/25a1433216489de4abc889910f744e952cb6dbae Added Reference https://git.kernel.org/stable/c/66f74ba9be9daf9c47fface6af3677f602774f6b Added Reference https://git.kernel.org/stable/c/7751f609eadf36b1f53712bae430019c53a16eb0 Added Reference https://git.kernel.org/stable/c/8a558261fa57a6deefb0925ab1829f698b194aea Added Reference https://git.kernel.org/stable/c/91e4ad05bf18322b5921d1a6c9b603f6eb1694f0 Added Reference https://git.kernel.org/stable/c/9fc198f415dee070a1de957bb5bf5921d8df3499 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 21, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: mcb: fix error handling in mcb_alloc_bus() There are two bugs: 1) If ida_simple_get() fails then this code calls put_device(carrier) but we haven't yet called get_device(carrier) and probably that leads to a use after free. 2) After device_initialize() then we need to use put_device() to release the bus. This will free the internal resources tied to the device and call mcb_free_bus() which will free the rest. Added Reference kernel.org https://git.kernel.org/stable/c/8a558261fa57a6deefb0925ab1829f698b194aea [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/115b07d9f47e3996430b8f2007edd9768e1f807f [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/66f74ba9be9daf9c47fface6af3677f602774f6b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7751f609eadf36b1f53712bae430019c53a16eb0 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/91e4ad05bf18322b5921d1a6c9b603f6eb1694f0 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/9fc198f415dee070a1de957bb5bf5921d8df3499 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/25a1433216489de4abc889910f744e952cb6dbae [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-2021-47361 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-2021-47361
weaknesses.