{
  "cveId": "CVE-2025-15467",
  "url": "https://patchblox.com/security/cve/CVE-2025-15467",
  "summary": "CVE-2025-15467 is fixed in 16 products on 1 platform, first by libssl3 3.0.2-0ubuntu1.21, released January 26, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libssl3t64: Issue summary: Parsing CMS AuthEnvelopedData or EnvelopedData message with maliciously crafted AEAD parameters can tr...",
  "description": "Issue summary: Parsing CMS AuthEnvelopedData or EnvelopedData 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 (Auth)EnvelopedData 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 (Auth)EnvelopedData 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. 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.",
  "published": "2026-01-26T16:00:00Z",
  "severity": "Medium",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.74793,
  "epssPercentile": 0.99507,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libssl3",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.0.2-0ubuntu1.21",
      "fix": "libssl3 3.0.2-0ubuntu1.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libssl3-3.0.2-0ubuntu1.21",
      "released": "2026-01-26T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libssl3t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.0.13-0ubuntu3.7",
      "fix": "libssl3t64 3.0.13-0ubuntu3.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libssl3t64-3.0.13-0ubuntu3.7",
      "released": "2026-01-26T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libssl3t64",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.5.3-1ubuntu3",
      "fix": "libssl3t64 3.5.3-1ubuntu3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libssl3t64-3.5.3-1ubuntu3",
      "released": "2026-01-26T16:00:00Z"
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    {
      "platform": "linux",
      "product": "libssl3t64",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.5.5-1ubuntu1",
      "fix": "libssl3t64 3.5.5-1ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libssl3t64-3.5.5-1ubuntu1",
      "released": "2026-01-26T16:00:00Z"
    },
    {
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      "product": "openssl",
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      "fixedVersion": "3.0.18-1~deb12u2",
      "fix": "DSA-6113-1",
      "url": "https://patchblox.com/security/fix/linux/dsa-6113-1",
      "released": "2026-01-27T00:00:00Z"
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    {
      "platform": "linux",
      "product": "openssl",
      "release": "Debian 14",
      "fixedVersion": "3.5.5-1",
      "fix": "DEBIAN-CVE-2025-15467",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-15467",
      "released": "2026-01-27T16:16:14Z"
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      "release": "RHEL 10",
      "fixedVersion": "3.2.2-16.el10_0.6",
      "fix": "RHSA-2026:1496",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-1496",
      "released": "2026-01-27T14:00:00Z"
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      "fix": "RHSA-2026:1473",
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      "released": "2026-01-28T00:00:00Z"
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-openssl-3.0.2-0ubuntu1.21",
      "released": "2026-01-26T16:00:00Z"
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    {
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      "release": "Ubuntu 24.04.5 LTS (noble)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-openssl-3.0.13-0ubuntu3.7",
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      "product": "openssl",
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      "fix": "openssl 3.5.3-1ubuntu3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-openssl-3.5.3-1ubuntu3",
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      "release": "Ubuntu 26.04.1 LTS (resolute)",
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      "platform": "linux",
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      "release": "amzn 2023",
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      "fix": "openssl-provider-legacy 3.5.5-1ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-openssl-provider-legacy-3.5.5-1ubuntu1",
      "released": "2026-01-26T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-snapsafe-libs",
      "release": "amzn 2023",
      "fixedVersion": "1:3.2.2-1.amzn2023.0.4",
      "fix": "ALAS2023-2026-1406",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1406",
      "released": "2026-02-05T22:03:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-snapsafe-libs-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:3.2.2-1.amzn2023.0.4",
      "fix": "ALAS2023-2026-1406",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1406",
      "released": "2026-02-05T22:03:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}