CVE-2021-47622
"Linux UFS SCSI Deadlock Vulnerability"
Description
In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: Fix a deadlock in the error handler The following deadlock has been observed on a test setup: - All tags allocated - The SCSI error handler calls ufshcd_eh_host_reset_handler() - ufshcd_eh_host_reset_handler() queues work that calls ufshcd_err_handler() - ufshcd_err_handler() locks up as follows: Workqueue: ufs_eh_wq_0 ufshcd_err_handler.cfi_jt Call trace: __switch_to+0x298/0x5d8 __schedule+0x6cc/0xa94 schedule+0x12c/0x298 blk_mq_get_tag+0x210/0x480 __blk_mq_alloc_request+0x1c8/0x284 blk_get_request+0x74/0x134 ufshcd_exec_dev_cmd+0x68/0x640 ufshcd_verify_dev_init+0x68/0x35c ufshcd_probe_hba+0x12c/0x1cb8 ufshcd_host_reset_and_restore+0x88/0x254 ufshcd_reset_and_restore+0xd0/0x354 ufshcd_err_handler+0x408/0xc58 process_one_work+0x24c/0x66c worker_thread+0x3e8/0xa4c kthread+0x150/0x1b4 ret_from_fork+0x10/0x30 Fix this lockup by making ufshcd_exec_dev_cmd() allocate a reserved request.
INFO
Published Date :
July 16, 2024, 12:15 p.m.
Last Modified :
Aug. 21, 2024, 5:31 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
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-2021-47622.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/493c9e850677df8b4eda150c2364b1c1a72ed724 | Mailing List Patch |
| https://git.kernel.org/stable/c/945c3cca05d78351bba29fa65d93834cb7934c7b | Mailing List Patch |
| https://git.kernel.org/stable/c/d69d98d8edf90e25e4e09930dd36dd6d09dd6768 | Mailing List Patch |
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47622 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47622 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]
Aug. 21, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/493c9e850677df8b4eda150c2364b1c1a72ed724 No Types Assigned https://git.kernel.org/stable/c/493c9e850677df8b4eda150c2364b1c1a72ed724 Mailing List, Patch Changed Reference Type https://git.kernel.org/stable/c/945c3cca05d78351bba29fa65d93834cb7934c7b No Types Assigned https://git.kernel.org/stable/c/945c3cca05d78351bba29fa65d93834cb7934c7b Mailing List, Patch Changed Reference Type https://git.kernel.org/stable/c/d69d98d8edf90e25e4e09930dd36dd6d09dd6768 No Types Assigned https://git.kernel.org/stable/c/d69d98d8edf90e25e4e09930dd36dd6d09dd6768 Mailing List, Patch Added CWE NIST CWE-667 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.15.25 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 5.16.11 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 16, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: Fix a deadlock in the error handler The following deadlock has been observed on a test setup: - All tags allocated - The SCSI error handler calls ufshcd_eh_host_reset_handler() - ufshcd_eh_host_reset_handler() queues work that calls ufshcd_err_handler() - ufshcd_err_handler() locks up as follows: Workqueue: ufs_eh_wq_0 ufshcd_err_handler.cfi_jt Call trace: __switch_to+0x298/0x5d8 __schedule+0x6cc/0xa94 schedule+0x12c/0x298 blk_mq_get_tag+0x210/0x480 __blk_mq_alloc_request+0x1c8/0x284 blk_get_request+0x74/0x134 ufshcd_exec_dev_cmd+0x68/0x640 ufshcd_verify_dev_init+0x68/0x35c ufshcd_probe_hba+0x12c/0x1cb8 ufshcd_host_reset_and_restore+0x88/0x254 ufshcd_reset_and_restore+0xd0/0x354 ufshcd_err_handler+0x408/0xc58 process_one_work+0x24c/0x66c worker_thread+0x3e8/0xa4c kthread+0x150/0x1b4 ret_from_fork+0x10/0x30 Fix this lockup by making ufshcd_exec_dev_cmd() allocate a reserved request. Added Reference kernel.org https://git.kernel.org/stable/c/493c9e850677df8b4eda150c2364b1c1a72ed724 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/d69d98d8edf90e25e4e09930dd36dd6d09dd6768 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/945c3cca05d78351bba29fa65d93834cb7934c7b [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-2021-47622 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-2021-47622
weaknesses.