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14 vulnerabilities by FreeRTOS
CVE-2026-77237 (GCVE-0-2026-77237)
Vulnerability from nvd – Published: 2026-08-21 17:52 – Updated: 2026-08-21 20:15
VLAI
EPSS
VEX
Title
Missing type validation in xQueueAddToSet in FreeRTOS-Kernel
Summary
Missing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports with configUSE_QUEUE_SETS=1 to read privileged kernel memory. To remediate this issue, users should upgrade to version 11.3.1 or later.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:44 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Kernel/relea… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/secur… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Kernel |
Affected:
7.4.0 , ≤ 11.3.0
(custom)
cpe:2.3:a:freertos:freertos-kernel:*:*:*:*:*:*:*:* |
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CVE-2026-77236 (GCVE-0-2026-77236)
Vulnerability from nvd – Published: 2026-08-21 17:47 – Updated: 2026-08-21 20:15
VLAI
EPSS
VEX
Title
Missing size validation in SecureContext_AllocateContext in FreeRTOS-Kernel
Summary
Missing minimum size validation in secure context allocation in FreeRTOS-Kernel before 11.3.1 might allow local users to corrupt secure-world heap metadata via an out-of-bounds write with an undersized stack size parameter. To remediate this issue, users should upgrade to version 11.3.1 or later.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:44 UTC
CWE
- CWE-787 - Out-of-bounds write
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/relea… | patch |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/secur… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Kernel |
Affected:
10.2.0 , ≤ 11.3.0
(custom)
cpe:2.3:a:freertos:freertos-kernel:*:*:*:*:*:*:*:* |
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CVE-2026-77235 (GCVE-0-2026-77235)
Vulnerability from nvd – Published: 2026-08-21 17:42 – Updated: 2026-08-27 16:46
VLAI
EPSS
VEX
Title
Missing privilege check in SecureContext_FreeContext in FreeRTOS-Kernel
Summary
Missing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might allow local users to cause a use-after-free condition in secure-world memory via the SVC handler for secure context deallocation. To remediate this issue, users should upgrade to version 11.3.1 or later.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 16:08 UTC
CWE
- CWE-416 - Use after free
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Kernel/relea… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/secur… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Kernel |
Affected:
10.2.0 , ≤ 11.3.0
(custom)
cpe:2.3:a:freertos:freertos-kernel:*:*:*:*:*:*:*:* |
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CVE-2026-77234 (GCVE-0-2026-77234)
Vulnerability from nvd – Published: 2026-08-21 17:40 – Updated: 2026-08-27 16:46
VLAI
EPSS
VEX
Title
Improper input validation in FreeRTOS-Kernel timer command handling
Summary
Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports to execute code in privileged kernel context. To remediate this issue, users should upgrade to version 11.3.1 or later.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 16:06 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Kernel/relea… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/secur… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Kernel |
Affected:
7.0.0 , ≤ 11.3.0
(custom)
cpe:2.3:a:freertos:freertos-kernel:*:*:*:*:*:*:*:* |
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CVE-2026-8686 (GCVE-0-2026-8686)
Vulnerability from nvd – Published: 2026-05-15 18:38 – Updated: 2026-05-15 20:22
VLAI
EPSS
VEX
Title
DoS from MQTT v5.0 Deserialization Fault in core MQTT
Summary
Missing bounds validation in the MQTT v5.0 property parser in coreMQTT before 5.0.1 allows an MQTT broker to cause a denial of service by sending a crafted packet.
To remediate this issue, users should upgrade to v5.0.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-15 20:22 UTC
CWE
- CWE-125 - Out-of-bounds read
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/coreMQTT/releases/tag… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/coreMQTT/security/adv… | third-party-advisory |
Impacted products
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CVE-2024-38373 (GCVE-0-2024-38373)
Vulnerability from nvd – Published: 2024-06-24 16:23 – Updated: 2024-08-02 04:04
VLAI
EPSS
VEX
Title
FreeRTOS-Plus-TCP Buffer Over-Read in DNS Response Parser
Summary
FreeRTOS-Plus-TCP is a lightweight TCP/IP stack for FreeRTOS. FreeRTOS-Plus-TCP versions 4.0.0 through 4.1.0 contain a buffer over-read issue in the DNS Response Parser when parsing domain names in a DNS response. A carefully crafted DNS response with domain name length value greater than the actual domain name length, could cause the parser to read beyond the DNS response buffer. This issue affects applications using DNS functionality of the FreeRTOS-Plus-TCP stack. Applications that do not use DNS functionality are not affected, even when the DNS functionality is enabled. This vulnerability has been patched in version 4.1.1.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-05 14:20 UTC
CWE
- CWE-126 - Buffer Over-read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/sec… | x_refsource_CONFIRM |
| https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/rel… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Plus-TCP |
Affected:
>= 4.0.0, <= 4.1.0
|
|
| amazon | freertos-plus-tcp |
Affected:
4.0.0 , < 4.1.1
(custom)
cpe:2.3:a:amazon:freertos-plus-tcp:4.0.0:*:*:*:*:*:*:* |
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CVE-2024-28115 (GCVE-0-2024-28115)
Vulnerability from nvd – Published: 2024-03-07 20:54 – Updated: 2024-08-28 17:42
VLAI
EPSS
VEX
Title
Privilege Escalation in FreeRTOS Kernel ARMv7-M MPU ports and ARMv8-M ports with MPU support enabled
Summary
FreeRTOS is a real-time operating system for microcontrollers. FreeRTOS Kernel versions through 10.6.1 do not sufficiently protect against local privilege escalation via Return Oriented Programming techniques should a vulnerability exist that allows code injection and execution. These issues affect ARMv7-M MPU ports, and ARMv8-M ports with Memory Protected Unit (MPU) support enabled (i.e. `configENABLE_MPU` set to 1). These issues are fixed in version 10.6.2 with a new MPU wrapper.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-08 19:12 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Kernel/secur… | x_refsource_CONFIRM |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/relea… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Kernel |
Affected:
< 10.6.2
|
|
| freertos | freertos-kernel |
Affected:
0 , < 10.6.2
(custom)
cpe:2.3:o:freertos:freertos-kernel:*:*:*:*:*:*:*:* |
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CVE-2026-77237 (GCVE-0-2026-77237)
Vulnerability from cvelistv5 – Published: 2026-08-21 17:52 – Updated: 2026-08-21 20:15
VLAI
EPSS
VEX
Title
Missing type validation in xQueueAddToSet in FreeRTOS-Kernel
Summary
Missing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports with configUSE_QUEUE_SETS=1 to read privileged kernel memory. To remediate this issue, users should upgrade to version 11.3.1 or later.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:44 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Kernel/relea… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/secur… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Kernel |
Affected:
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CVE-2026-77236 (GCVE-0-2026-77236)
Vulnerability from cvelistv5 – Published: 2026-08-21 17:47 – Updated: 2026-08-21 20:15
VLAI
EPSS
VEX
Title
Missing size validation in SecureContext_AllocateContext in FreeRTOS-Kernel
Summary
Missing minimum size validation in secure context allocation in FreeRTOS-Kernel before 11.3.1 might allow local users to corrupt secure-world heap metadata via an out-of-bounds write with an undersized stack size parameter. To remediate this issue, users should upgrade to version 11.3.1 or later.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:44 UTC
CWE
- CWE-787 - Out-of-bounds write
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/relea… | patch |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/secur… | third-party-advisory |
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CVE-2026-77235 (GCVE-0-2026-77235)
Vulnerability from cvelistv5 – Published: 2026-08-21 17:42 – Updated: 2026-08-27 16:46
VLAI
EPSS
VEX
Title
Missing privilege check in SecureContext_FreeContext in FreeRTOS-Kernel
Summary
Missing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might allow local users to cause a use-after-free condition in secure-world memory via the SVC handler for secure context deallocation. To remediate this issue, users should upgrade to version 11.3.1 or later.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 16:08 UTC
CWE
- CWE-416 - Use after free
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Kernel/relea… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/secur… | third-party-advisory |
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CVE-2026-77234 (GCVE-0-2026-77234)
Vulnerability from cvelistv5 – Published: 2026-08-21 17:40 – Updated: 2026-08-27 16:46
VLAI
EPSS
VEX
Title
Improper input validation in FreeRTOS-Kernel timer command handling
Summary
Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports to execute code in privileged kernel context. To remediate this issue, users should upgrade to version 11.3.1 or later.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 16:06 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Kernel/relea… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/secur… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Kernel |
Affected:
7.0.0 , ≤ 11.3.0
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cpe:2.3:a:freertos:freertos-kernel:*:*:*:*:*:*:*:* |
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CVE-2026-8686 (GCVE-0-2026-8686)
Vulnerability from cvelistv5 – Published: 2026-05-15 18:38 – Updated: 2026-05-15 20:22
VLAI
EPSS
VEX
Title
DoS from MQTT v5.0 Deserialization Fault in core MQTT
Summary
Missing bounds validation in the MQTT v5.0 property parser in coreMQTT before 5.0.1 allows an MQTT broker to cause a denial of service by sending a crafted packet.
To remediate this issue, users should upgrade to v5.0.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-15 20:22 UTC
CWE
- CWE-125 - Out-of-bounds read
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/coreMQTT/releases/tag… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/coreMQTT/security/adv… | third-party-advisory |
Impacted products
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CVE-2024-38373 (GCVE-0-2024-38373)
Vulnerability from cvelistv5 – Published: 2024-06-24 16:23 – Updated: 2024-08-02 04:04
VLAI
EPSS
VEX
Title
FreeRTOS-Plus-TCP Buffer Over-Read in DNS Response Parser
Summary
FreeRTOS-Plus-TCP is a lightweight TCP/IP stack for FreeRTOS. FreeRTOS-Plus-TCP versions 4.0.0 through 4.1.0 contain a buffer over-read issue in the DNS Response Parser when parsing domain names in a DNS response. A carefully crafted DNS response with domain name length value greater than the actual domain name length, could cause the parser to read beyond the DNS response buffer. This issue affects applications using DNS functionality of the FreeRTOS-Plus-TCP stack. Applications that do not use DNS functionality are not affected, even when the DNS functionality is enabled. This vulnerability has been patched in version 4.1.1.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-05 14:20 UTC
CWE
- CWE-126 - Buffer Over-read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/sec… | x_refsource_CONFIRM |
| https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/rel… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Plus-TCP |
Affected:
>= 4.0.0, <= 4.1.0
|
|
| amazon | freertos-plus-tcp |
Affected:
4.0.0 , < 4.1.1
(custom)
cpe:2.3:a:amazon:freertos-plus-tcp:4.0.0:*:*:*:*:*:*:* |
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CVE-2024-28115 (GCVE-0-2024-28115)
Vulnerability from cvelistv5 – Published: 2024-03-07 20:54 – Updated: 2024-08-28 17:42
VLAI
EPSS
VEX
Title
Privilege Escalation in FreeRTOS Kernel ARMv7-M MPU ports and ARMv8-M ports with MPU support enabled
Summary
FreeRTOS is a real-time operating system for microcontrollers. FreeRTOS Kernel versions through 10.6.1 do not sufficiently protect against local privilege escalation via Return Oriented Programming techniques should a vulnerability exist that allows code injection and execution. These issues affect ARMv7-M MPU ports, and ARMv8-M ports with Memory Protected Unit (MPU) support enabled (i.e. `configENABLE_MPU` set to 1). These issues are fixed in version 10.6.2 with a new MPU wrapper.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-08 19:12 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Kernel/secur… | x_refsource_CONFIRM |
| https://github.com/FreeRTOS/FreeRTOS-Kernel/relea… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Kernel |
Affected:
< 10.6.2
|
|
| freertos | freertos-kernel |
Affected:
0 , < 10.6.2
(custom)
cpe:2.3:o:freertos:freertos-kernel:*:*:*:*:*:*:*:* |
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"containers": {
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
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"discovery": "UNKNOWN"
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