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CVE-2026-9267

Quick assessment

Affected
Eclipse Foundation Eclipse tinydtls
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Eclipse tinydtls是美国Eclipse基金会开源的一个轻量级DTLS协议库。 Eclipse tinydtls b3efd41ad111a4920f599f51ffa4f5e9f1e72221之前版本存在缓冲区错误漏洞，该漏洞源于check_server_certificate()函数中存在越界读取问题，在uint24读取、memcmp和memcpy操作之前缺少缓冲区长度验证，未经身份验证的攻击者可以通过构造带有特定fragment_length值的Certificate握手消息触发超出有效

AI Predicted 7.5 Difficulty: Easy EPSS 0.27% · P18

Affected Version Matrix 1

VendorProduct Version RangeStatus
Eclipse Foundation Eclipse tinydtls < b3efd41ad111a4920f599f51ffa4f5e9f1e72221 affected
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I. Basic Information for CVE-2026-9267

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Eclipse tinydtls before commit b3efd41ad111a4920f599f51ffa4f5e9f1e72221 contains an out-of-bounds read vulnerability in the check_server_certificate() function that allows unauthenticated attackers to trigger reads beyond valid buffer boundaries by crafting a Certificate handshake message with a specific fragment_length value. Attackers can exploit missing buffer length validation before uint24 reads, memcmp, and memcpy operations during DTLS epoch 0 on both client and server paths to cause denial of service on memory-constrained devices.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Eclipse tinydtls 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Eclipse tinydtls是美国Eclipse基金会开源的一个轻量级DTLS协议库。 Eclipse tinydtls b3efd41ad111a4920f599f51ffa4f5e9f1e72221之前版本存在缓冲区错误漏洞，该漏洞源于check_server_certificate()函数中存在越界读取问题，在uint24读取、memcmp和memcpy操作之前缺少缓冲区长度验证，未经身份验证的攻击者可以通过构造带有特定fragment_length值的Certificate握手消息触发超出有效
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
Eclipse Foundation Eclipse tinydtls 0 ~ b3efd41ad111a4920f599f51ffa4f5e9f1e72221 -

II. Public POCs for CVE-2026-9267

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III. Intelligence Information for CVE-2026-9267

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Vendor Advisories for CVE-2026-9267 (1)

IV. Related Vulnerabilities

Same product: Eclipse tinydtls
Same vendor: Eclipse Foundation
Same weakness: CWE-125

V. Comments for CVE-2026-9267

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