CVE-2026-77237CWE-125CWE-843

CVE-2026-77237

Medium · published August 21, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
6.7
In the wild
Unconfirmed
What it is

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 record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
8.2 · CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
EPSS
0.00175 · 6.7th percentile
Weaknesses
CWE-125 · Out-of-bounds Read; CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')
Published
2026-08-21T22:16Z
Affected products (1)
ProductVersionsFixed in
amazon/freertos≥ 7.4.0, < 11.3.111.3.1
References (3)
https://aws.amazon.com/security/security-bulletins/2026-086-aws/ · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-9wvc-hqvx-5wf5 · ff89ba41-3aa1-4d27-914a-91399e9639e5
EPSS history
Timeline
  • 21 AUG 17:52Z
    Missing type validation in xQueueAddToSet in FreeRTOS-Kernel
    cvelistv5