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 – Updated: 2024-09-16 22:03
VLAI?
Title
Linux kernel KVM Power8 conflicting use of HSTATE_HOST_R1
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")
Severity ?
6.5 (Medium)
CWE
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux kernel | Linux kernel |
Affected:
4.8 , < unspecified
(custom)
Affected: unspecified , < 4.18 (custom) |
Credits
Gustavo Romero
Paul Mackerras
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CVE-2021-21941 (GCVE-0-2021-21941)
Vulnerability from cvelistv5 – Published: 2021-10-12 13:35 – Updated: 2024-08-03 18:30
VLAI?
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.
Severity ?
10 (Critical)
CWE
- CWE-368 - Context Switching Race Condition
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
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CVE-2021-32025 (GCVE-0-2021-32025)
Vulnerability from cvelistv5 – Published: 2022-03-09 20:37 – Updated: 2025-08-22 15:36
VLAI?
Summary
An elevation of privilege vulnerability in the QNX Neutrino Kernel of affected versions of QNX Software Development Platform version(s) 6.4.0 to 7.0, QNX Momentics all 6.3.x versions, QNX OS for Safety versions 1.0.0 to 1.0.2, QNX OS for Safety versions 2.0.0 to 2.0.1, QNX for Medical versions 1.0.0 to 1.1.1, and QNX OS for Medical version 2.0.0 could allow an attacker to potentially access data, modify behavior, or permanently crash the system.
Severity ?
8.1 (High)
CWE
- Elevation of privilege
- CWE-368 - Context Switching Race Condition
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| BlackBerry | QNX Software Development Platform (SDP), QNX OS for Medical (QOSM), and QNX OS for Safety (QOS) |
Affected:
QNX SDP 6.4.0 to 7.0
Affected: QNX Momentics all 6.3.x versions Affected: QNX OS for Safety versions 1.0.0 to 1.0.2 safety products compliant with IEC 61508 and/or ISO 26262 Affected: QNX OS for Safety versions 2.0.0 to 2.0.1 safety products compliant with IEC 61508 and/or ISO 26262 Affected: QNX OS for Medical versions 1.0.0 to 1.1.1 safety products compliant with IEC 62304 Affected: QNX OS for Medical versions 2.0.0 safety product compliant with IEC 62304 |
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CVE-2022-21806 (GCVE-0-2022-21806)
Vulnerability from cvelistv5 – Published: 2022-06-17 17:40 – Updated: 2025-04-15 19:00
VLAI?
Summary
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.
Severity ?
10 (Critical)
CWE
- CWE-368 - Context Switching Race Condition
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Anker | Eufy Homebase 2 |
Affected:
2.1.8.5h
|
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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.