CWE · MITRE source
CWE-667Improper Locking
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
Locking is a type of synchronization behavior that ensures that multiple independently-operating processes or threads do not interfere with each other when accessing the same resource. All processes/threads are expected to follow the same steps for locking. If these steps are not followed precisely - or if no locking is done at all - then another process/thread could modify the shared resource in a way that is not visible or predictable to the original process. This can lead to data or memory corruption, denial of service, etc.
Last updated: 09 May 2026 03:25 UTC
NIST 800-53 r5 controls that address this weakness (0)AI
| Control | Title | Family | Why it addresses this CWE |
|---|---|---|---|
| No NIST controls proposed yet. | |||
Top CVEs of this weakness type, ranked by Risk Priority
| CVE | Risk | CVSS | EPSS | Published |
|---|---|---|---|---|
CVE-2019-10072 | 5.8 | 7.5 | 0.7130 | 2019-06-21 |
CVE-2021-1782 KEV | 3.8 | 7.0 | 0.0588 | 2021-04-02 |
CVE-2025-43510 KEV | 3.6 | 7.8 | 0.0030 | 2025-12-12 |
CVE-2004-0174 | 2.7 | 7.5 | 0.1992 | 2004-05-04 |
CVE-2009-2699 | 2.1 | 7.5 | 0.0928 | 2009-10-13 |
CVE-2020-24606 | 2.1 | 8.6 | 0.0634 | 2020-08-24 |
CVE-2018-0228 | 2.0 | 8.6 | 0.0416 | 2018-04-19 |
CVE-2019-5886 | 2.0 | 9.8 | 0.0041 | 2019-01-10 |
CVE-2020-12658 | 2.0 | 9.8 | 0.0057 | 2020-12-31 |
CVE-2020-0303 | 1.8 | 8.8 | 0.0037 | 2020-09-17 |
CVE-2020-15674 | 1.8 | 8.8 | 0.0031 | 2020-10-01 |
CVE-2026-31629 | 1.8 | 8.8 | 0.0003 | 2026-04-24 |
CVE-2002-1850 | 1.7 | 7.5 | 0.0291 | 2002-12-31 |
CVE-2006-2275 | 1.7 | 7.5 | 0.0317 | 2006-05-09 |
CVE-2006-5158 | 1.7 | 7.5 | 0.0404 | 2006-10-05 |
CVE-2020-11284 | 1.7 | 8.4 | 0.0003 | 2021-05-07 |
CVE-2021-1622 | 1.7 | 8.6 | 0.0027 | 2021-09-23 |
CVE-2002-0051 | 1.6 | 7.8 | 0.0083 | 2002-04-04 |
CVE-2009-4272 | 1.6 | 7.5 | 0.0181 | 2010-01-27 |
CVE-2010-4210 | 1.6 | 7.8 | 0.0026 | 2010-11-22 |
CVE-2018-1000127 | 1.6 | 7.5 | 0.0100 | 2018-03-13 |
CVE-2019-2050 | 1.6 | 7.8 | 0.0001 | 2019-05-08 |
CVE-2019-2025 | 1.6 | 7.8 | 0.0019 | 2019-06-19 |
CVE-2019-2174 | 1.6 | 7.8 | 0.0001 | 2019-09-05 |
CVE-2019-10494 | 1.6 | 8.1 | 0.0016 | 2019-12-12 |