Vulnerability · Published Feb 7, 2022 · Assigned by zephyr
CVE-2021-3835Buffer overflow in usb device class
High 8.2
In plain English
A high-severity heap buffer overflow in zephyr from zephyrproject-rtos. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.7%top 45.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | zephyr | no fix listed | UBUNTU-CVE-2021-3835 |
| Ubuntu:24.04:LTS | zephyr | no fix listed | UBUNTU-CVE-2021-3835 |
| Ubuntu:25.10 | zephyr | no fix listed | UBUNTU-CVE-2021-3835 |
| Ubuntu:26.04:LTS | zephyr | no fix listed | UBUNTU-CVE-2021-3835 |
| Ubuntu:26.10 | zephyr | no fix listed | UBUNTU-CVE-2021-3835 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| zephyrproject-rtos | zephyr | v2.6.0 – before unspecified |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H