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    CVE-2024-31031

    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.

    Published:Apr 17, 2024
    Last Modified:Nov 4, 2025
    EPS:Apr 17, 2024
    EPSS Score:0.00076
    CVSS Score:7.5

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Libcoap
    Product
    Libcoap

    Exploits

    https://github.com/obgm/libcoap/issues/1351https://github.com/obgm/libcoap/issues/1351

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

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    References

    https://github.com/obgm/libcoap/issues/1351
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPENEJBV3KSASIYKNZAKXDAH7Q66KPYG/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUL7QDYFGEIJVO2ZSG4O5HEAWR6PFC52/
    https://github.com/obgm/libcoap/issues/1351
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPENEJBV3KSASIYKNZAKXDAH7Q66KPYG/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUL7QDYFGEIJVO2ZSG4O5HEAWR6PFC52/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/LPENEJBV3KSASIYKNZAKXDAH7Q66KPYG/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/TUL7QDYFGEIJVO2ZSG4O5HEAWR6PFC52/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High