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Medium severity6.5OSV Advisory· Published Dec 8, 2025· Updated Jun 17, 2026

CVE-2025-59391

CVE-2025-59391

Description

A memory disclosure vulnerability exists in libcoap's OSCORE configuration parser in libcoap before release-4.3.5-patches. An out-of-bounds read may occur when parsing certain configuration values, allowing an attacker to infer or read memory beyond string boundaries in the .rodata section. This could potentially lead to information disclosure or denial of service.

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Affected products

4
  • Obgm/LibcoapOSV2 versions
    coap-lwip, v4.1.1, v4.1.2, …+ 1 more
    • (no CPE)range: coap-lwip, v4.1.1, v4.1.2, …
    • (no CPE)range: <4.3.5-patches
  • Libcoap/Libcoap2 versions
    cpe:2.3:a:libcoap:libcoap:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:libcoap:libcoap:*:*:*:*:*:*:*:*range: <4.3.5a
    • (no CPE)range: <4.3.5-patches

Patches

Vulnerability mechanics

References

2

News mentions

0

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