An issue in coap_pdu.c in libcoap 4.3.4 allows attackers to cause undefined behavior via a sequence of messages leading to unsigned integer overflow.
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Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2024-04-17. NVD baseline CVSS 7.5; sources differ by 0.0.
An issue in coap_pdu.c in libcoap 4.3.4 allows attackers to cause undefined behavior via a sequence of messages leading to unsigned integer overflow.
April 17, 2024
November 4, 2025
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CWE-190