CVE-2021-3436— BT: Possible to overwrite an existing bond during keys distribution phase when the identity address of the bond is known
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I. Basic Information for CVE-2021-3436
Vulnerability Information
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Vulnerability Title
BT: Possible to overwrite an existing bond during keys distribution phase when the identity address of the bond is known
Source: NVD (National Vulnerability Database)
Vulnerability Description
BT: Possible to overwrite an existing bond during keys distribution phase when the identity address of the bond is known. Zephyr versions >= 1.14.2, >= 2.4.0, >= 2.5.0 contain Use of Multiple Resources with Duplicate Identifier (CWE-694). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-j76f-35mc-4h63
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用多个具有重复标识的资源
Source: NVD (National Vulnerability Database)
Vulnerability Title
Zephyr 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zephyr是美国Linux基金会的一套开源的小型的可缩放的实时操作系统。 Zephyr 存在安全漏洞，该漏洞源于在密钥分发阶段，当已知密钥的身份地址时，可以覆盖现有的密钥。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| zephyrproject-rtos | zephyr | 1.14.2 ~ unspecified | - |
II. Public POCs for CVE-2021-3436
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · zephyrproject-rtos · 2021-10-05 · 5 CVEs total
| CVE-2021-3625 | 9.6 CRITICAL | Buffer overflow in Zephyr USB DFU DNLOAD |
| CVE-2021-3510 | 7.5 HIGH | Zephyr JSON decoder incorrectly decodes array of array |
| CVE-2021-3581 | 7.0 HIGH | Buffer Access with Incorrect Length Value in zephyr |
| CVE-2021-3319 | 6.5 MEDIUM | DOS: Incorrect 802154 Frame Validation for Omitted Source / Dest Addresses |
IV. Related Vulnerabilities
Same product: zephyr
- CVE-2026-1677
net: TLS 1.2 connections allowed on TLS 1.3 sockets - CVE-2026-5590
net: ip/tcp: Null pointer dereference can be triggered by a - CVE-2026-1679
net: eswifi socket send payload length not bounded - CVE-2026-4179
stm32: usb: Infinite while loop in Interrupt Handler - CVE-2026-0849
crypto: ATAES132A response length allows stack buffer overfl
Same vendor: zephyrproject-rtos
- CVE-2026-1677
net: TLS 1.2 connections allowed on TLS 1.3 sockets - CVE-2026-5590
net: ip/tcp: Null pointer dereference can be triggered by a - CVE-2026-1679
net: eswifi socket send payload length not bounded - CVE-2026-4179
stm32: usb: Infinite while loop in Interrupt Handler - CVE-2026-0849
crypto: ATAES132A response length allows stack buffer overfl
Same weakness: CWE-694
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V. Comments for CVE-2021-3436
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