CVE-2021-3625
Buffer overflow in Zephyr USB DFU DNLOAD
CRITICAL
9.8
CVSS Score
Published: October 5, 2021 at 08:50 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
2 products affected across 2 vendorsZephyrZephyr
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Severity
CRITICAL9.8
Exploit prediction
EPSS 2%
Description
Buffer overflow in Zephyr USB DFU DNLOAD. Zephyr versions >= v2.5.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-c3gr-hgvr-f363
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
2.5.0 ≤ v < 2.7.0
Affected range stops below 2.7.0, so it looks safe — our inference, not a vendor statement
v ≥ v2.5.02.5.0
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (1)
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-c3gr-hgvr-f363CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-122CWE-787
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