PT-2025-49575 · Libcoap+2 · Libcoap+2

Published 2025-12-08 · Updated 2026-02-24 · CVE-2025-59391

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions libcoap versions prior to 4.3.5-patches

Description A memory disclosure issue exists in libcoap's OSCORE configuration parser. An out-of-bounds read can occur when parsing specific configuration values, potentially allowing an attacker to infer or read memory beyond string boundaries in the .rodata section. This could lead to information disclosure or denial of service.

Recommendations Update to version 4.3.5-patches or later.

Fix

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2025-59391

Affected Products

Debian

Red Os

Libcoap

References · 14

• https://github.com/obgm/libcoap/pull/1730 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-59391 · Security Note
• https://cve.org/CVERecord?id=CVE-2025-59391 · Security Note
• https://ubuntu.com/security/CVE-2025-59391 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-59391 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-59391 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-59391 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-59391 · Vendor Advisory
• https://github.com/obgm/libcoap/releases/tag/v4.3.5a · Note
• https://t.me/cveNotify/145600 · Telegram Post
• https://t.me/CVEtracker/39137 · Telegram Post
• https://twitter.com/CVEnew/status/1998079610655744147 · Twitter Post
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-libcoap-cve-2025-59391-8.0 · Note
• https://twitter.com/VulmonFeeds/status/1998198202386743758 · Twitter Post