Missing check for thread priority
Priority LOW 25CWE-770Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.
Summary
In Eclipse ThreadX before version 6.4.3, the thread module has a setting of maximum priority. In some cases the check of that maximum priority wasn't performed, allowing, as a result, to obtain a thread with higher priority than expected and causing a possible denial of service.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00176 7th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed ThreadX (Eclipse Foundation): 6.4.3
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Eclipse Foundation | ThreadX | before 6.4.3 | 6.4.3 | Patch available | CNA |
- ThreadX VendorEclipse Foundation Affected before 6.4.3 Fixed in 6.4.3 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:eclipse:threadx:*:*:*:*:*:*:*:* | before 6.4.3 | Vulnerable | Eclipse Foundation |
- cpe:2.3:a:eclipse:threadx:*:*:*:*:*:*:*:* Versions before 6.4.3 Vulnerable ·Eclipse Foundation
Remediation
- Fix · CNA ThreadX (Eclipse Foundation) Fixed in 6.4.3
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Eclipse Foundation ThreadX 6.4.3
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2025-34770 Improper Parameter Check in ThreadX Syscall ImplementationPriority LOW 33
Timeline
- 2026-10-02 Threatist record created from CVE-2025-55079
References
More Eclipse Foundation Threadx vulnerabilities
- TI-2024-02054 Heap-based buffer overflow in Eclipse Foundation ThreadX CVSS 3.1HIGH 7.8
- TI-2026-00443 Out-of-bounds write in Eclipse ThreadX CVSS 3.1HIGH 7.8
- TI-2024-02056 Missing array size check in _Mtxinit() in the Xtensa port CVSS 3.1HIGH 7.8
- TI-2025-34770 Improper Parameter Check in ThreadX Syscall Implementation CVSS 4.0HIGH 7.2
- TI-2025-34768 Incomplete validation of kernel object pointers in system calls CVSS 4.0MEDIUM 5.7
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences