CVE-2021-42147

9.1 criticalEPSS 0.8%

Critical (9.1) in contiki-ng tinydtls. EPSS 0.8% chance of exploitation in the next 30 days.

Buffer over-read vulnerability in the dtls_sha256_update function in Contiki-NG tinyDTLS through master branch 53a0d97 allows remote attackers to cause a denial of service via crafted data packet.

Severity

CVSS 3.1

9.1 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-31)
CWE: CWE-125
Published: 2024-01-24
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

contiki-ng:tinydtls

References

https://seclists.org/fulldisclosure/2024/Jan/20
http://seclists.org/fulldisclosure/2024/Jan/20
https://seclists.org/fulldisclosure/2024/Jan/20

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