CWE-832
Unlock of a Resource that is not Locked
Incomplete
2010-12-13 00:00 +00:00
2023-06-29 00:00 +00:00
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Unlock of a Resource that is not Locked
The product attempts to unlock a resource that is not locked.
Extended Description
Depending on the locking functionality, an unlock of a non-locked resource might cause memory corruption or other modification to the resource (or its associated metadata that is used for tracking locks).
Informations
Common Consequences
| Scope | Impact | Likelihood |
|---|---|---|
| Integrity Confidentiality Availability Other | DoS: Crash, Exit, or Restart, Execute Unauthorized Code or Commands, Modify Memory, Other Note: Depending on the locking being used, an unlock operation might not have any adverse effects. When effects exist, the most common consequence will be a corruption of the state of the product, possibly leading to a crash or exit; depending on the implementation of the unlocking, memory corruption or code execution could occur. |
Observed Examples
| Reference | Description |
|---|---|
| function in OS kernel unlocks a mutex that was not previously locked, causing a panic or overwrite of arbitrary memory. | |
| Chain: OS kernel does not properly handle a failure of a function call (CWE-755), leading to an unlock of a resource that was not locked (CWE-832), with resultant crash. | |
| OS kernel performs an unlock in some incorrect circumstances, leading to panic. |
Vulnerability Mapping Notes
Rationale : This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.Comments : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.
Submission
| Name | Organization | Date | Date Release | Version |
|---|---|---|---|---|
| CWE Content Team | MITRE | 1.11 |
Modifications
| Name | Organization | Date | Comment |
|---|---|---|---|
| CWE Content Team | MITRE | updated Common_Consequences | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Common_Consequences, Description | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Mapping_Notes |
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