7.3highHigh
CVE-2026-77236
Amazon Freertos
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.
Exploitation status
- A vendor advisory or patch reference has been published.
What the metrics mean
- It is requires local access to the machine.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, an ordinary user account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 7.3 (v3.1)
- Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H- CVSS v4
- 8.3
- Weakness
- CWE-787
- Assigned by
- ff89ba41-3aa1-4d27-914a-91399e9639e5
Dates
- Published
- 2026-08-21
- Last modified
- 2026-08-25
- Sources
- NVD
Affected products
- Amazon Freertos10.2.0 - 11.3.1
As listed in the NVD configuration data. Not a statement about your estate.