Integer Overflow or Wraparound Affecting libcoap package, versions [0,]
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Test your applications- Snyk IDSNYK-CONAN-LIBCOAP-14105089
- published25 Nov 2025
- disclosed24 Nov 2025
- creditQingpeng Du
Introduced: 24 Nov 2025
NewCVE-2025-65495 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound via the tls_verify_call_back() function. An attacker can trigger a denial of service by supplying a specially crafted TLS certificate that causes i2d_X509() to return -1, which is then misused as a parameter to malloc(), potentially leading to a crash.