CVE-2025-15467 (GCVE-0-2025-15467)

Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-27 16:01
VLAI?
Title
Stack buffer overflow in CMS AuthEnvelopedData parsing
Summary
Issue summary: Parsing CMS AuthEnvelopedData message with maliciously crafted AEAD parameters can trigger a stack buffer overflow. Impact summary: A stack buffer overflow may lead to a crash, causing Denial of Service, or potentially remote code execution. When parsing CMS AuthEnvelopedData structures that use AEAD ciphers such as AES-GCM, the IV (Initialization Vector) encoded in the ASN.1 parameters is copied into a fixed-size stack buffer without verifying that its length fits the destination. An attacker can supply a crafted CMS message with an oversized IV, causing a stack-based out-of-bounds write before any authentication or tag verification occurs. Applications and services that parse untrusted CMS or PKCS#7 content using AEAD ciphers (e.g., S/MIME AuthEnvelopedData with AES-GCM) are vulnerable. Because the overflow occurs prior to authentication, no valid key material is required to trigger it. While exploitability to remote code execution depends on platform and toolchain mitigations, the stack-based write primitive represents a severe risk. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the CMS implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3 and 3.0 are vulnerable to this issue. OpenSSL 1.1.1 and 1.0.2 are not affected by this issue.
Severity ?
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: 3.6.0 , < 3.6.1 (semver)
Affected: 3.5.0 , < 3.5.5 (semver)
Affected: 3.4.0 , < 3.4.4 (semver)
Affected: 3.3.0 , < 3.3.6 (semver)
Affected: 3.0.0 , < 3.0.19 (semver)
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Credits
Stanislav Fort (Aisle Research) Igor Ustinov
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              "version": "3.5.0",
              "versionType": "semver"
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          "type": "reporter",
          "value": "Stanislav Fort (Aisle Research)"
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      "datePublic": "2026-01-27T14:00:00.000Z",
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      "metrics": [
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          "format": "other",
          "other": {
            "content": {
              "text": "High"
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            "type": "https://openssl-library.org/policies/general/security-policy/"
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          "tags": [
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          "url": "https://openssl-library.org/news/secadv/20260127.txt"
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      "source": {
        "discovery": "UNKNOWN"
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    "cveId": "CVE-2025-15467",
    "datePublished": "2026-01-27T16:01:19.922Z",
    "dateReserved": "2026-01-06T09:26:41.631Z",
    "dateUpdated": "2026-01-27T16:01:19.922Z",
    "state": "PUBLISHED"
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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