CWE-368

Context Switching Race Condition

A product performs a series of non-atomic actions to switch between contexts that cross privilege or other security boundaries, but a race condition allows an attacker to modify or misrepresent the product's behavior during the switch.

CVE-2020-8834 (GCVE-0-2020-8834)
Vulnerability from cvelistv5
Published
2020-04-09 22:10
Modified
2024-09-16 22:03
Severity ?
6.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE
Summary
KVM in the Linux kernel on Power8 processors has a conflicting use of HSTATE_HOST_R1 to store r1 state in kvmppc_hv_entry plus in kvmppc_{save,restore}_tm, leading to a stack corruption. Because of this, an attacker with the ability run code in kernel space of a guest VM can cause the host kernel to panic. There were two commits that, according to the reporter, introduced the vulnerability: f024ee098476 ("KVM: PPC: Book3S HV: Pull out TM state save/restore into separate procedures") 87a11bb6a7f7 ("KVM: PPC: Book3S HV: Work around XER[SO] bug in fake suspend mode") The former landed in 4.8, the latter in 4.17. This was fixed without realizing the impact in 4.18 with the following three commits, though it's believed the first is the only strictly necessary commit: 6f597c6b63b6 ("KVM: PPC: Book3S PR: Add guest MSR parameter for kvmppc_save_tm()/kvmppc_restore_tm()") 7b0e827c6970 ("KVM: PPC: Book3S HV: Factor fake-suspend handling out of kvmppc_save/restore_tm") 009c872a8bc4 ("KVM: PPC: Book3S PR: Move kvmppc_save_tm/kvmppc_restore_tm to separate file")
References
Impacted products
Vendor Product Version
Linux kernel Linux kernel Version: 4.8   < unspecified
Version: unspecified   < 4.18
 Create a notification for this product.
Show details on NVD website

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CVE-2021-21941 (GCVE-0-2021-21941)
Vulnerability from cvelistv5
Published
2021-10-12 13:35
Modified
2024-08-03 18:30
Severity ?
10.0 (Critical) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-368 - Context Switching Race Condition
Summary
A use-after-free vulnerability exists in the pushMuxer CreatePushThread functionality of Anker Eufy Homebase 2 2.1.6.9h. A specially-crafted set of network packets can lead to remote code execution.
References
Impacted products
Vendor Product Version
n/a Anker Version: Anker Eufy Homebase 2 2.1.6.9h
Show details on NVD website

To clipboard 

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CVE-2022-21806 (GCVE-0-2022-21806)
Vulnerability from cvelistv5
Published
2022-06-17 17:40
Modified
2025-04-15 19:00
Severity ?
10.0 (Critical) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-368 - Context Switching Race Condition
Summary
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References
Impacted products
Vendor Product Version
Anker Eufy Homebase 2 Version: 2.1.8.5h
 Create a notification for this product.
Show details on NVD website

To clipboard 

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        "CVE_data_meta": {
          "ASSIGNER": "talos-cna@cisco.com",
          "DATE_PUBLIC": "2022-06-15",
          "ID": "CVE-2022-21806",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Eufy Homebase 2",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "=",
                            "version_value": "2.1.8.5h"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Anker"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A use-after-free vulnerability exists in the mips_collector appsrv_server functionality of Anker Eufy Homebase 2 2.1.8.5h. A specially-crafted set of network packets can lead to remote code execution. The device is exposed to attacks from the network."
            }
          ]
        },
        "impact": {
          "cvss": {
            "baseScore": 10,
            "baseSeverity": "Critical",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-368: Context Switching Race Condition"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://talosintelligence.com/vulnerability_reports/TALOS-2022-1440",
              "refsource": "MISC",
              "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2022-1440"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
    "assignerShortName": "talos",
    "cveId": "CVE-2022-21806",
    "datePublished": "2022-06-17T17:40:13.512Z",
    "dateReserved": "2022-01-06T00:00:00.000Z",
    "dateUpdated": "2025-04-15T19:00:31.630Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

No mitigation information available for this CWE.

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.

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