Stack-based Buffer Overflow Affecting openssl package, versions [3.0.5,3.0.19)[3.1.0,3.3.6)[3.4.0,3.4.4)[3.5.0,3.5.5)[3.6.0,3.6.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-CONAN-OPENSSL-15123718
- published28 Jan 2026
- disclosed27 Jan 2026
- creditStanislav Fort
Introduced: 27 Jan 2026
CVE-2025-15467 (opens in a new tab)How to fix?
Upgrade openssl to version 3.0.19, 3.3.6, 3.4.4, 3.5.5, 3.6.1 or higher.
Overview
Affected versions of this package are vulnerable to Stack-based Buffer Overflow when parsing a CMS AuthEnvelopedData message. An attacker can trigger a crash by supplying AEAD ciphers such as AES-GCM with malicious initialization vectors. These are encoded in the ASN.1 parameters and copied into a fixed-size stack buffer without verifying that its length fits the destination. Applications that parse untrusted CMS or PKCS#7 data using AEAD ciphers, such as S/MIME AuthEnvelopedData with AES-GCM, are vulnerable. The memory corruption may be controllable to enable code execution.