Common Weakness Enumeration

CWE-362

Allowed-with-Review

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Abstraction: Class · Status: Draft

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

3078 vulnerabilities reference this CWE, most recent first.

CVE-2026-82543 (GCVE-0-2026-82543)

Vulnerability from cvelistv5 – Published: 2026-08-30 12:45 – Updated: 2026-08-31 16:48 X_Open Source
VLAI
Title
vastsa FileCodeBox Pickup Limit views.py update_file_usage race condition
Summary
A vulnerability was detected in vastsa FileCodeBox up to 2.3. This vulnerability affects the function update_file_usage of the file apps/base/views.py of the component Pickup Limit Handler. Performing a manipulation results in race condition. It is possible to initiate the attack remotely. The exploit is now public and may be used. Upgrading to version 2.5.0 is able to resolve this issue. The patch is named 8d7d856c62d73badd0797eb4daec8d2ff10a403a. Upgrading the affected component is recommended.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 16:48 UTC
CWE
Impacted products
Vendor Product Version
vastsa FileCodeBox Affected: 2.0
Affected: 2.1
Affected: 2.2
Affected: 2.3
Unaffected: 2.5.0
    cpe:2.3:a:vastsa:filecodebox:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-82364 (GCVE-0-2026-82364)

Vulnerability from cvelistv5 – Published: 2026-08-29 11:00 – Updated: 2026-08-31 22:04
VLAI
Title
macrozheng mall Order Submission submit race condition
Summary
A security vulnerability has been detected in macrozheng mall up to 1.0.3. This impacts an unknown function of the file /order/submit of the component Order Submission. The manipulation leads to race condition. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is said to be difficult. The vendor deleted the GitHub issue for this vulnerability without and explanation.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 21:17 UTC
CWE
References
Impacted products
Vendor Product Version
macrozheng mall Affected: 1.0.0
Affected: 1.0.1
Affected: 1.0.2
Affected: 1.0.3
    cpe:2.3:a:macrozheng:mall:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-82258 (GCVE-0-2026-82258)

Vulnerability from cvelistv5 – Published: 2026-08-28 10:49 – Updated: 2026-08-31 18:36
VLAI
Title
SvelteKit 2.38.0 before 2.60.1 Cross-User Data Disclosure via query.batch
Summary
SvelteKit versions from 2.38.0 before 2.60.1 contain a race condition in query.batch that allows concurrent requests from different users to merge under a single request context. Attackers can exploit specific timing conditions to access sensitive data from other users' concurrent requests.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:36 UTC
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
References
Impacted products
Vendor Product Version
sveltejs kit Affected: 2.38.0 , < 2.60.1 (semver)
Unaffected: 2.60.1 (semver)
    cpe:2.3:a:svelte:kit:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-05-14 00:00
Show details on NVD website

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CVE-2026-77638 (GCVE-0-2026-77638)

Vulnerability from cvelistv5 – Published: 2026-08-20 20:52 – Updated: 2026-08-27 16:06
VLAI
Summary
Tor before 0.4.9.11 is prone to a race condition where in just the right circumstances a rendezvous point could man-in-the-middle (impersonate) the onion service that the client was trying to reach.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 15:44 UTC
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Impacted products
Vendor Product Version
torproject Tor Affected: 0.3.5.3-alpha , < 0.4.9.11 (custom)
    cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
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Show details on NVD website

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CVE-2026-77063 (GCVE-0-2026-77063)

Vulnerability from cvelistv5 – Published: 2026-08-28 19:54 – Updated: 2026-08-31 18:40
VLAI
Title
multer vulnerable to file size limit bypass via async fileFilter race condition
Summary
multer is a middleware for handling multipart/form-data in Node.js. When an application uses an asynchronous fileFilter together with the fileSize limit, a race condition in multer's file stream handling can allow a file that exceeds the configured size limit to bypass the size-limit rejection. All versions before 2.3.0 are affected. The impact is limited because the underlying multipart parser still truncates the stream at the size limit, so this is a bypass of the limit rejection rather than uncontrolled resource consumption. The issue is fixed in multer 2.3.0. Upgrade to multer 2.3.0 to remediate.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:40 UTC
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Impacted products
Vendor Product Version
multer multer Affected: 0 , < 2.3.0 (semver)
Unaffected: 2.3.0 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-76393 (GCVE-0-2026-76393)

Vulnerability from cvelistv5 – Published: 2026-08-19 21:35 – Updated: 2026-08-26 19:36
VLAI
Title
Race Condition during Model Upload through the REST API in Splunk AI Toolkit
Summary
In Splunk AI Toolkit versions below 6.0.0, a user who can upload models could overwrite a model being uploaded by another user by sending a concurrent upload request for the same model name, causing the resulting model lookup entry to reference attacker-controlled content. The race condition is possible because Splunk AI Toolkit does not verify that the uploaded content belongs to the request that creates the model lookup entry. For more information see Troubleshoot the Splunk Machine Learning Toolkit (https://help.splunk.com/en/splunk-cloud-platform/apply-machine-learning/machine-learning-toolkit-user-guide/5.5.0/troubleshooting-mltk/troubleshoot-the-splunk-machine-learning-toolkit) in the Splunk documentation.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 19:35 UTC
CWE
  • CWE-362 - The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.
Impacted products
Vendor Product Version
Splunk Splunk AI Toolkit Affected: 5.7 , < 6.0.0 (custom)
Create a notification for this product.
Date Public
2026-08-19 00:00
Show details on NVD website

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CVE-2026-73557 (GCVE-0-2026-73557)

Vulnerability from cvelistv5 – Published: 2026-08-13 15:00 – Updated: 2026-08-13 17:52
VLAI
Title
vLLM: Incomplete CVE-2025-62164 remediation can be bypassed by concurrent prompt parts
Summary
vLLM is an inference and serving engine for large language models. From 0.20.2rc0 until 0.26.0, safe_load_prompt_embeds in vllm/renderers/embed_utils.py uses torch.sparse.check_sparse_tensor_invariants, whose process-global save, enable, and restore state can be raced by concurrent prompt_embeds parts submitted to POST /v1/chat/completions through AsyncMultiModalItemTracker.resolve_items, asyncio.gather, and the default executor, allowing an invalid sparse tensor to reach tensor.to_dense despite the CVE-2025-62164 guard when enable_prompt_embeds is enabled. This issue is fixed in version 0.26.0.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 17:50 UTC
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Impacted products
Vendor Product Version
vllm-project vllm Affected: >= 0.20.2rc0, < 0.26.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-71968 (GCVE-0-2026-71968)

Vulnerability from cvelistv5 – Published: 2026-08-10 18:15 – Updated: 2026-08-17 18:18 X_Open Source
VLAI
Title
OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Loader TA_FLAG_CONCURRENT
Summary
OP-TEE OS through 4.10.0, fixed in commit 8794043, contains a use-after-free vulnerability in the Trusted Application loader that allows attackers with the ability to load a signed Trusted Application to corrupt secure-world kernel memory by setting the TA_FLAG_CONCURRENT flag in a user TA signed header. Attackers can cause two concurrent sessions to operate on the same shared context without locking, corrupting the uctx->vm_info.regions list during memref parameter mapping and unmapping to free vm_region nodes still in use, resulting in a use-after-free in S-EL1 secure-world kernel memory.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 17:08 UTC
CWE
  • CWE-416 - Use After Free
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Impacted products
Vendor Product Version
OP-TEE optee_os Affected: 0 , ≤ 4.10.0 (semver)
Unaffected: 8794043c4065c26a2b8b1313794ba5ba5f06d296 (git)
    cpe:2.3:o:op-tee:op-tee_os:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-07-30 00:00
Show details on NVD website

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CVE-2026-70640 (GCVE-0-2026-70640)

Vulnerability from cvelistv5 – Published: 2026-08-06 15:38 – Updated: 2026-08-14 16:51 X_Open Source
VLAI
Title
llama.cpp b1886–b7445 Race Condition Use-After-Free via llama-android.cpp
Summary
llama.cpp builds b1886 through b7445 contain a race condition use-after-free vulnerability in the LLaMA-Android JNI wrapper where bench_1model() and free_1context() lack synchronization, allowing Thread A to operate on freed memory while Thread B concurrently frees the llama_context. Attackers can exploit this by performing heap spray with attacker-controlled data containing a fake vtable to hijack the vtable pointer at offset +0x30, causing llama_batch_allocr::clear() to dereference arbitrary memory and achieve remote code execution.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 16:18 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Impacted products
Vendor Product Version
ggml-org llama.cpp Affected: b1886 , ≤ b7445 (custom)
Affected: 0.9.0 , ≤ 0.17.1 (semver)
Unaffected: 5c0d18881e0e9794c96b2602736b758bac9d9388 (git)
    cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:*
    cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-05-06 00:00
Show details on NVD website

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CVE-2026-66802 (GCVE-0-2026-66802)

Vulnerability from cvelistv5 – Published: 2026-08-11 17:07 – Updated: 2026-08-31 20:07
VLAI
Title
Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability
Summary
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Device Health Attestation (DHA) allows an unauthorized attacker to execute code over a network.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 00:00 UTC
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
  • CWE-416 - Use After Free
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.9121 (custom)
Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.2704 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.9121 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.9121 (custom)
Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.5499 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.33296 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.33296 (custom)
Create a notification for this product.
Date Public
2026-08-11 14:00
Show details on NVD website

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                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.33296",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.33296",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.28000.2704",
                  "versionStartIncluding": "10.0.28000.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-08-11T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Concurrent execution using shared resource with improper synchronization (\u0027race condition\u0027) in Windows Device Health Attestation (DHA) allows an unauthorized attacker to execute code over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
              "lang": "en-US",
              "type": "CWE"
            },
            {
              "cweId": "CWE-416",
              "description": "CWE-416: Use After Free",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-31T20:07:46.984Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66802"
        }
      ],
      "title": "Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-66802",
    "datePublished": "2026-08-11T17:07:00.979Z",
    "dateReserved": "2026-07-27T19:02:26.600Z",
    "dateUpdated": "2026-08-31T20:07:46.984Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Mitigation
Architecture and Design

In languages that support it, use synchronization primitives. Only wrap these around critical code to minimize the impact on performance.

Mitigation
Architecture and Design

Use thread-safe capabilities such as the data access abstraction in Spring.

Mitigation
Architecture and Design
  • Minimize the usage of shared resources in order to remove as much complexity as possible from the control flow and to reduce the likelihood of unexpected conditions occurring.
  • Additionally, this will minimize the amount of synchronization necessary and may even help to reduce the likelihood of a denial of service where an attacker may be able to repeatedly trigger a critical section (CWE-400).
Mitigation
Implementation

When using multithreading and operating on shared variables, only use thread-safe functions.

Mitigation
Implementation

Use atomic operations on shared variables. Be wary of innocent-looking constructs such as "x++". This may appear atomic at the code layer, but it is actually non-atomic at the instruction layer, since it involves a read, followed by a computation, followed by a write.

Mitigation
Implementation

Use a mutex if available, but be sure to avoid related weaknesses such as CWE-412.

Mitigation
Implementation

Avoid double-checked locking (CWE-609) and other implementation errors that arise when trying to avoid the overhead of synchronization.

Mitigation
Implementation

Disable interrupts or signals over critical parts of the code, but also make sure that the code does not go into a large or infinite loop.

Mitigation
Implementation

Use the volatile type modifier for critical variables to avoid unexpected compiler optimization or reordering. This does not necessarily solve the synchronization problem, but it can help.

Mitigation MIT-17
Architecture and Design Operation

Strategy: Environment Hardening

Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.

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-29: Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions

This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.