FreeRTOS up to 11.3.0 Kernel xQueueAddToSet privileges management

Summaryinfo

A vulnerability categorized as problematic has been discovered in FreeRTOS up to 11.3.0. Affected by this issue is the function xQueueAddToSet of the component Kernel. The manipulation results in privileges management. This vulnerability is cataloged as CVE-2026-77237. The attack must be initiated from a local position. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in FreeRTOS up to 11.3.0. Affected is the function xQueueAddToSet of the component Kernel. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-77237 since 08/20/2026. The exploitability is told to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 11.3.1 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• FreeRTOS

Version

• 11.0
• 11.1
• 11.2
• 11.3.0

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