CVE-2021-3434
L2CAP: Stack based buffer overflow in le_ecred_conn_req()
HIGH
7.8
CVSS Score
Published: June 28, 2022 at 07:45 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
2 products affected across 2 vendorsZephyrZephyr
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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
Description
Stack based buffer overflow in le_ecred_conn_req(). Zephyr versions >= v2.5.0 Stack-based Buffer Overflow (CWE-121). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8w87-6rfp-cfrm
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
2.5.0 ≤ v < 2.6.0
Affected range stops below 2.6.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
x_refsource_MISCVendor Advisory
Source: [email protected]
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8w87-6rfp-cfrmCVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-121CWE-787
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