CVE-2026-77237

Missing type validation in xQueueAddToSet in FreeRTOS-Kernel

HIGH
8.4
CVSS Score
Published: August 21, 2026 at 05:52 PM UTC
Updated: October 14, 2026 at 07:10 PM UTC
2 products affected across 2 vendorsFreeRTOSFreeRTOS

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Severity
HIGH8.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions7.4.0 ≤ v < 11.3.1
Affected range stops below 11.3.1, so it looks safe — our inference, not a vendor statement
7.4.0 ≤ v ≤ 11.3.07.4.0

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-843CWE-125

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