What is CVE-2021-47622?

CVE-2021-47622 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Improper Locking flaw (CWE-667), affecting Linux kernel versions from 5.4.112 onward and patched in 5.15.25, 5.16.11 and 5.17. CVE-2021-47622 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47622?

CVE-2021-47622 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47622?

Yes, CVE-2021-47622 has been patched. Fixed versions include 5.15.25, 5.16.11 and 5.17. If you are running Linux kernel 5.4.112 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47622 actively exploited?

CVE-2021-47622 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Improper Locking (CWE-667)?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/667.html

CVE-2021-47622

Medium

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.

Package Linux Kernel

Published 2024-07-16

Last modified 2024-11-21

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-667

CVE-2021-47622 is a Improper Locking vulnerability

What is Improper Locking?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.4.112, 5.6 and later are affected. Fixed in 5.15.25, 5.16.11, 5.17 and their respective stable series.

Affected from

≥ 5.4.112 ≥ 5.6

Fixed in

✓ 5.15.25 5.15.x ✓ 5.16.11 5.16.x ✓ 5.17

References

3 total

Kernel Git
https://git.kernel.org/stable/c/493c9e850677df8b4eda150c2364b1c1a72ed724

Mailing List Patch
Kernel Git
https://git.kernel.org/stable/c/945c3cca05d78351bba29fa65d93834cb7934c7b

Mailing List Patch
Kernel Git
https://git.kernel.org/stable/c/d69d98d8edf90e25e4e09930dd36dd6d09dd6768

Mailing List Patch

Details

CVE ID CVE-2021-47622

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-07-16

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47622?

CVE-2021-47622 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Improper Locking flaw (CWE-667) . It affects Linux kernel versions from 5.4.112 onward and has been patched in 5.15.25, 5.16.11 and 5.17. CVE-2021-47622 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47622?

CVE-2021-47622 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47622?

Yes. CVE-2021-47622 has been patched. Fixed versions include 5.15.25, 5.16.11 and 5.17. If you are running Linux kernel 5.4.112 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47622 actively exploited?

No. CVE-2021-47622 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.