FreeRTOS up to 11.3.0 Secure Context Cleanup use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in FreeRTOS up to 11.3.0. Impacted is an unknown function of the component Secure Context Cleanup Handler. Executing a manipulation can lead to use after free. This vulnerability appears as CVE-2026-77235. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability has been found in FreeRTOS up to 11.3.0 and classified as problematic. This vulnerability affects an unknown code block of the component Secure Context Cleanup Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-77235 since 08/20/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available.

Upgrading to version 11.3.1 eliminates this vulnerability.

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Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.3
CNA Vector (AMZN): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreeRTOS 11.3.1

Timelineinfo

08/20/2026 CVE reserved
08/21/2026 +1 days Advisory disclosed
08/21/2026 +0 days VulDB entry created
08/21/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-77235 (🔒)
GCVE (CVE): GCVE-0-2026-77235
GCVE (VulDB): GCVE-100-394168

Entryinfo

Created: 08/21/2026 20:19
Changes: 08/21/2026 20:19 (75)
Complete: 🔍
Cache ID: 216::103

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