CVE-2026-77236 json
Missing size validation in SecureContext_AllocateContext in FreeRTOS-Kernel
published 2026-08-21 2 mo ago modified 2026-10-14 25 d ago also EUVD-2026-64017
- cvss
- 7.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 5%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H |
| CNA | 4.0 | 8.3 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:H/SA:H |
| CNA | 4.0 | 8.3 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- FreeRTOS FreeRTOS-Kernel
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
github.com
/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1
patch, release-notes
-
aws.amazon.com
/security/security-bulletins/2026-086-aws/
vendor-advisory
-
github.com
/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-vq2f-9qj3-jj2m
third-party-advisory, vendor-advisory
Sources
- CVE List CVE-2026-77236
- NVD CVE-2026-77236
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