CVE-2021-3835
HIGHCVSS 8.8/10EPSS 0.73%
Last modified
CVE-2021-3835 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Buffer overflow in usb device class. Zephyr versions >= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). EPSS estimates a 0.73% chance of exploitation in the next 30 days.
Description
Buffer overflow in usb device class. Zephyr versions >= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fm6v-8625-99jf
Metrics
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Zephyrproject | Zephyr | >= 2.6.0, < 2.7.1 | — |
| Zephyrproject | Zephyr | 3.0.0 | Rc1 |
References
- http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fm6v-8625-99jfExploit, Third Party Advisory
- http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fm6v-8625-99jfExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3835?
Buffer overflow in usb device class. Zephyr versions >= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fm6v-8625-99jf
How severe is CVE-2021-3835?
CVE-2021-3835 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3835?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2021-3835?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST