Common Weakness Enumeration

CWE-667

Allowed-with-Review

Improper Locking

Abstraction: Class · Status: Draft

API response cwe.mitre.org

The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

727 vulnerabilities reference this CWE, most recent first.

CVE-2022-0897 (GCVE-0-2022-0897)

Vulnerability from cvelistv5 – Published: 2022-03-25 00:00 – Updated: 2024-08-02 23:47
VLAI
Summary
A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to acquire the driver->nwfilters mutex before iterating over virNWFilterObj instances. There was no protection to stop another thread from concurrently modifying the driver->nwfilters object. This flaw allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to crash the network filter management daemon (libvirtd/virtnwfilterd).
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-08 15:53 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a libvirt Affected: libvirt 8.0.0-8
Show details on NVD website
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CVE-2021-41213 (GCVE-0-2021-41213)

Vulnerability from cvelistv5 – Published: 2021-11-05 22:10 – Updated: 2024-08-04 03:08
VLAI
Title
Deadlock in mutually recursive `tf.function` objects
Summary
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Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
tensorflow tensorflow Affected: >= 2.6.0, < 2.6.1
Affected: >= 2.5.0, < 2.5.2
Affected: < 2.4.4
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2021-41141 (GCVE-0-2021-41141)

Vulnerability from cvelistv5 – Published: 2022-01-04 00:00 – Updated: 2025-04-23 19:15
VLAI
Title
Missing release of locks in PJSIP
Summary
PJSIP is a free and open source multimedia communication library written in the C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In various parts of PJSIP, when error/failure occurs, it is found that the function returns without releasing the currently held locks. This could result in a system deadlock, which cause a denial of service for the users. No release has yet been made which contains the linked fix commit. All versions up to an including 2.11.1 are affected. Users may need to manually apply the patch.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 14:12 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
pjsip pjproject Affected: <= 2.11.1
Create a notification for this product.
Show details on NVD website
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CVE-2021-22530 (GCVE-0-2021-22530)

Vulnerability from cvelistv5 – Published: 2024-08-28 06:29 – Updated: 2024-08-28 13:31
VLAI
Title
Improper account management vulnerability in NetIQ Advance Authentication
Summary
A vulnerability identified in NetIQ Advance Authentication that doesn't enforce account lockout when brute force attack is performed on API based login. This issue may lead to user account compromise if successful or may impact server performance. This issue impacts all NetIQ Advance Authentication before 6.3.5.1
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-28 13:19 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
OpenText NetIQ Advance Authentication Affected: 6.3.5.1 , < < (server)
Create a notification for this product.
Show details on NVD website
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CVE-2021-20315 (GCVE-0-2021-20315)

Vulnerability from cvelistv5 – Published: 2022-02-18 00:00 – Updated: 2024-08-03 17:37
VLAI
Summary
A locking protection bypass flaw was found in some versions of gnome-shell as shipped within CentOS Stream 8, when the "Application menu" or "Window list" GNOME extensions are enabled. This flaw allows a physical attacker who has access to a locked system to kill existing applications and start new ones as the locked user, even if the session is still locked.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a gnome-shell Affected: gnome-shell 3.32.2-40.el8
Show details on NVD website
To clipboard 

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CVE-2021-20291 (GCVE-0-2021-20291)

Vulnerability from cvelistv5 – Published: 2021-04-01 17:49 – Updated: 2024-08-03 17:37
VLAI
Summary
A deadlock vulnerability was found in 'github.com/containers/storage' in versions before 1.28.1. When a container image is processed, each layer is unpacked using `tar`. If one of those layers is not a valid `tar` archive this causes an error leading to an unexpected situation where the code indefinitely waits for the tar unpacked stream, which never finishes. An attacker could use this vulnerability to craft a malicious image, which when downloaded and stored by an application using containers/storage, would then cause a deadlock leading to a Denial of Service (DoS).
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a containers/storage Affected: containers/storage 1.28.1
Show details on NVD website
To clipboard 

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CVE-2021-4149 (GCVE-0-2021-4149)

Vulnerability from cvelistv5 – Published: 2022-03-23 19:46 – Updated: 2024-08-03 17:16
VLAI
Summary
A vulnerability was found in btrfs_alloc_tree_b in fs/btrfs/extent-tree.c in the Linux kernel due to an improper lock operation in btrfs. In this flaw, a user with a local privilege may cause a denial of service (DOS) due to a deadlock problem.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a kernel Affected: kernel 5.15 rc6
Show details on NVD website
To clipboard 

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CVE-2021-4147 (GCVE-0-2021-4147)

Vulnerability from cvelistv5 – Published: 2022-03-25 00:00 – Updated: 2024-08-03 17:16
VLAI
Summary
A flaw was found in the libvirt libxl driver. A malicious guest could continuously reboot itself and cause libvirtd on the host to deadlock or crash, resulting in a denial of service condition.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a libvirt Affected: libvirt 2.33.0
Show details on NVD website
To clipboard 

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CVE-2021-3735 (GCVE-0-2021-3735)

Vulnerability from cvelistv5 – Published: 2022-08-26 15:25 – Updated: 2025-02-28 13:07
VLAI
Summary
A deadlock issue was found in the AHCI controller device of QEMU. It occurs on a software reset (ahci_reset_port) while handling a host-to-device Register FIS (Frame Information Structure) packet from the guest. A privileged user inside the guest could use this flaw to hang the QEMU process on the host, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
  • CWE-667 - - Improper Locking -> CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
n/a QEMU Affected: Not Known
Show details on NVD website
To clipboard 

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CVE-2021-3667 (GCVE-0-2021-3667)

Vulnerability from cvelistv5 – Published: 2022-03-02 00:00 – Updated: 2025-02-13 16:28
VLAI
Summary
An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly released on ACL permission failure. Clients connecting to the read-write socket with limited ACL permissions could use this flaw to acquire the lock and prevent other users from accessing storage pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a libvirt Affected: Fixedin - libvert v7.6.0-rc1 and above
Show details on NVD website
To clipboard 

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Mitigation
Implementation

Strategy: Libraries or Frameworks

Use industry standard APIs to implement locking mechanism.

CAPEC-25: Forced Deadlock

The adversary triggers and exploits a deadlock condition in the target software to cause a denial of service. A deadlock can occur when two or more competing actions are waiting for each other to finish, and thus neither ever does. Deadlock conditions can be difficult to detect.

CAPEC-26: Leveraging Race Conditions

The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with their version and cause the system to read the malicious file.

CAPEC-27: Leveraging Race Conditions via Symbolic Links

This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to them. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file they will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.

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