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CVE-2026-9267

MEDIUM
6.9
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-9267
State
PUBLISHED
Assigner
eclipse
Reserved
2026-05-22 07:42 UTC
Published
2026-06-29 08:10 UTC
Last updated
2026-06-29 11:47 UTC
Primary CWE
CWE-125
CWE-125 Out-of-bounds read
Vendor / Product
Eclipse Foundation / Eclipse tinydtls
Sources
cve.org  ·  NVD

Severity & Metrics

6.9 MEDIUM CVSS 4.0
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
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
Eclipse Foundation Eclipse tinydtls — 0 < b3efd41ad111a4920f599f51ffa4f5e9f1e72221
Weakness (CWE)
CWESourceDescription
CWE-125 cna CWE-125 Out-of-bounds read
CVSS scores (1)
ScoreSeverityVersionSourceVector
6.9 MEDIUM 4.0 cna 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
References (1)
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