CVE-2025-15467

  1. Yack CVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-15467

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

I

ssue 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.

References
Link Resource
https://github.com/openssl/openssl/commit/2c8f0e5fa9b6ee5508a0349e4572ddb74db5a703 Patch
https://github.com/openssl/openssl/commit/5f26d4202f5b89664c5c3f3c62086276026ba9a9 Patch
https://github.com/openssl/openssl/commit/6ced0fe6b10faa560e410e3ee8d6c82f06c65ea3 Patch
https://github.com/openssl/openssl/commit/ce39170276daec87f55c39dad1f629b56344429e Patch
https://github.com/openssl/openssl/commit/d0071a0799f20cc8101730145349ed4487c268dc Patch
https://openssl-library.org/news/secadv/20260127.txt Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/01/27/10 Mailing List
http://www.openwall.com/lists/oss-security/2026/02/25/6
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
History

25 Feb 2026, 22:16

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2026/02/25/6 -

25 Feb 2026, 19:43

Type Values Removed Values Added
Summary (en) 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. (en) 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.

02 Feb 2026, 18:38

Type Values Removed Values Added
CPE cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
First Time Openssl
Openssl openssl
References () https://github.com/openssl/openssl/commit/2c8f0e5fa9b6ee5508a0349e4572ddb74db5a703 - () https://github.com/openssl/openssl/commit/2c8f0e5fa9b6ee5508a0349e4572ddb74db5a703 - Patch
References () https://github.com/openssl/openssl/commit/5f26d4202f5b89664c5c3f3c62086276026ba9a9 - () https://github.com/openssl/openssl/commit/5f26d4202f5b89664c5c3f3c62086276026ba9a9 - Patch
References () https://github.com/openssl/openssl/commit/6ced0fe6b10faa560e410e3ee8d6c82f06c65ea3 - () https://github.com/openssl/openssl/commit/6ced0fe6b10faa560e410e3ee8d6c82f06c65ea3 - Patch
References () https://github.com/openssl/openssl/commit/ce39170276daec87f55c39dad1f629b56344429e - () https://github.com/openssl/openssl/commit/ce39170276daec87f55c39dad1f629b56344429e - Patch
References () https://github.com/openssl/openssl/commit/d0071a0799f20cc8101730145349ed4487c268dc - () https://github.com/openssl/openssl/commit/d0071a0799f20cc8101730145349ed4487c268dc - Patch
References () https://openssl-library.org/news/secadv/20260127.txt - () https://openssl-library.org/news/secadv/20260127.txt - Vendor Advisory
References () http://www.openwall.com/lists/oss-security/2026/01/27/10 - () http://www.openwall.com/lists/oss-security/2026/01/27/10 - Mailing List

29 Jan 2026, 15:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8

27 Jan 2026, 22:15

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2026/01/27/10 -

27 Jan 2026, 16:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-27 16:16

Updated : 2026-02-25 22:16

NVD link : CVE-2025-15467

Mitre link : CVE-2025-15467

CVE.ORG link : CVE-2025-15467

JSON object : View

Products Affected

openssl

CWE
CWE-787

Out-of-bounds Write