CVE-2025-15467

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.

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.

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.

OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.

Security Fix(es):

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.(CVE-2025-15467)

OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.

Security Fix(es):

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.(CVE-2025-15467)

OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.

Security Fix(es):

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.(CVE-2025-15467)

EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications.

Security Fix(es):

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.(CVE-2025-15467)

EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications.

Security Fix(es):

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.(CVE-2025-15467)

EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications.

Security Fix(es):

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.(CVE-2025-15467)

EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications.

Security Fix(es):

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.(CVE-2025-15467)

OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.

Security Fix(es):

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.(CVE-2025-15467)

Issue summary: When using the low-level OCB API directly with AES-NI or other hardware-accelerated code paths, inputs whose length is not a multiple of 16 bytes can leave the final partial block unencrypted and unauthenticated.

Impact summary: The trailing 1-15 bytes of a message may be exposed in cleartext on encryption and are not covered by the authentication tag, allowing an attacker to read or tamper with those bytes without detection.

The low-level OCB encrypt and decrypt routines in the hardware-accelerated stream path process full 16-byte blocks but do not advance the input/output pointers. The subsequent tail-handling code then operates on the original base pointers, effectively reprocessing the beginning of the buffer while leaving the actual trailing bytes unprocessed. The authentication checksum also excludes the true tail bytes.

However, typical OpenSSL consumers using EVP are not affected because the higher-level EVP and provider OCB implementations split inputs so that full blocks and trailing partial blocks are processed in separate calls, avoiding the problematic code path. Additionally, TLS does not use OCB ciphersuites. The vulnerability only affects applications that call the low-level CRYPTO_ocb128_encrypt() or CRYPTO_ocb128_decrypt() functions directly with non-block-aligned lengths in a single call on hardware-accelerated builds. For these reasons the issue was assessed as Low severity.

The FIPS modules in 3six, 3five, 3four, 3three, 3two, 3one and 3zero are not affected by this issue, as OCB mode is not a FIPS-approved algorithm.

OpenSSL 3six, 3five, 3four, 3three, 3zero and 1one1 are vulnerable to this issue. OpenSSL 1zero2 is not affected by this issue.(CVE-2025-69418)

Issue summary: Calling PKCS12_get_friendlyname() function on a maliciously crafted PKCS#12 file with a BMPString (UTF-16BE) friendly name containing non-ASCII BMP code point can trigger a one byte write before the allocated buffer.

Impact summary: The out-of-bounds write can cause a memory corruption which can have various consequences including a Denial of Service.

The OPENSSL_uni2utf8() function performs a two-pass conversion of a PKCS#12 BMPString (UTF-16BE) to UTF-8. In the second pass, when emitting UTF-8 bytes, the helper function bmp_to_utf8() incorrectly forwards the remaining UTF-16 source byte count as the destination buffer capacity to UTF8_putc(). For BMP code points above U+07FF, UTF-8 requires three bytes, but the…

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

• openssl: OpenSSL: Arbitrary code execution or denial of service through crafted PKCS#12 file (CVE-2025-11187)

• openssl: OpenSSL: Remote code execution or Denial of Service via oversized Initialization Vector in CMS parsing (CVE-2025-15467)

• openssl: OpenSSL: Denial of Service via NULL pointer dereference in QUIC protocol handling (CVE-2025-15468)

• openssl: OpenSSL: Data integrity bypass in openssl dgst command due to silent truncation (CVE-2025-15469)

• openssl: OpenSSL: Denial of Service due to excessive memory allocation in TLS 1.3 certificate compression (CVE-2025-66199)

• openssl: OpenSSL: Denial of Service due to out-of-bounds write in BIO filter (CVE-2025-68160)

• openssl: OpenSSL: Information disclosure and data tampering via specific low-level OCB encryption/decryption calls (CVE-2025-69418)

• openssl: OpenSSL: Arbitrary code execution due to out-of-bounds write in PKCS#12 processing (CVE-2025-69419)

• openssl: OpenSSL: Denial of Service via malformed PKCS#12 file processing (CVE-2025-69421)

• openssl: OpenSSL: Denial of Service via malformed TimeStamp Response (CVE-2025-69420)

• openssl: OpenSSL: Denial of Service due to type confusion in PKCS#12 file processing (CVE-2026-22795)

• openssl: OpenSSL: Denial of Service via type confusion in PKCS#7 signature verification (CVE-2026-22796)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

• openssl: OpenSSL: Arbitrary code execution or denial of service through crafted PKCS#12 file (CVE-2025-11187)

• openssl: OpenSSL: Remote code execution or Denial of Service via oversized Initialization Vector in CMS parsing (CVE-2025-15467)

• openssl: OpenSSL: Denial of Service via NULL pointer dereference in QUIC protocol handling (CVE-2025-15468)

• openssl: OpenSSL: Data integrity bypass in openssl dgst command due to silent truncation (CVE-2025-15469)

• openssl: OpenSSL: Denial of Service due to excessive memory allocation in TLS 1.3 certificate compression (CVE-2025-66199)

• openssl: OpenSSL: Denial of Service due to out-of-bounds write in BIO filter (CVE-2025-68160)

• openssl: OpenSSL: Information disclosure and data tampering via specific low-level OCB encryption/decryption calls (CVE-2025-69418)

• openssl: OpenSSL: Arbitrary code execution due to out-of-bounds write in PKCS#12 processing (CVE-2025-69419)

• openssl: OpenSSL: Denial of Service via malformed PKCS#12 file processing (CVE-2025-69421)

• openssl: OpenSSL: Denial of Service via malformed TimeStamp Response (CVE-2025-69420)

• openssl: OpenSSL: Denial of Service due to type confusion in PKCS#12 file processing (CVE-2026-22795)

• openssl: OpenSSL: Denial of Service via type confusion in PKCS#7 signature verification (CVE-2026-22796)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

• openssl: OpenSSL: Arbitrary code execution or denial of service through crafted PKCS#12 file (CVE-2025-11187)
• openssl: OpenSSL: Remote code execution or Denial of Service via oversized Initialization Vector in CMS parsing (CVE-2025-15467)
• openssl: OpenSSL: Denial of Service via NULL pointer dereference in QUIC protocol handling (CVE-2025-15468)
• openssl: OpenSSL: Data integrity bypass in openssl dgst command due to silent truncation (CVE-2025-15469)
• openssl: OpenSSL: Denial of Service due to excessive memory allocation in TLS 1.3 certificate compression (CVE-2025-66199)
• openssl: OpenSSL: Denial of Service due to out-of-bounds write in BIO filter (CVE-2025-68160)
• openssl: OpenSSL: Information disclosure and data tampering via specific low-level OCB encryption/decryption calls (CVE-2025-69418)
• openssl: OpenSSL: Arbitrary code execution due to out-of-bounds write in PKCS#12 processing (CVE-2025-69419)
• openssl: OpenSSL: Denial of Service via malformed PKCS#12 file processing (CVE-2025-69421)
• openssl: OpenSSL: Denial of Service via malformed TimeStamp Response (CVE-2025-69420)
• openssl: OpenSSL: Denial of Service due to type confusion in PKCS#12 file processing (CVE-2026-22795)
• openssl: OpenSSL: Denial of Service via type confusion in PKCS#7 signature verification (CVE-2026-22796)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

• openssl: OpenSSL: Arbitrary code execution or denial of service through crafted PKCS#12 file (CVE-2025-11187)
• openssl: OpenSSL: Remote code execution or Denial of Service via oversized Initialization Vector in CMS parsing (CVE-2025-15467)
• openssl: OpenSSL: Denial of Service via NULL pointer dereference in QUIC protocol handling (CVE-2025-15468)
• openssl: OpenSSL: Data integrity bypass in openssl dgst command due to silent truncation (CVE-2025-15469)
• openssl: OpenSSL: Denial of Service due to excessive memory allocation in TLS 1.3 certificate compression (CVE-2025-66199)
• openssl: OpenSSL: Denial of Service due to out-of-bounds write in BIO filter (CVE-2025-68160)
• openssl: OpenSSL: Information disclosure and data tampering via specific low-level OCB encryption/decryption calls (CVE-2025-69418)
• openssl: OpenSSL: Arbitrary code execution due to out-of-bounds write in PKCS#12 processing (CVE-2025-69419)
• openssl: OpenSSL: Denial of Service via malformed PKCS#12 file processing (CVE-2025-69421)
• openssl: OpenSSL: Denial of Service via malformed TimeStamp Response (CVE-2025-69420)
• openssl: OpenSSL: Denial of Service due to type confusion in PKCS#12 file processing (CVE-2026-22795)
• openssl: OpenSSL: Denial of Service via type confusion in PKCS#7 signature verification (CVE-2026-22796)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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.

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.

Stack buffer overflow in CMS AuthEnvelopedData parsing. (CVE-2025-15467) Heap out-of-bounds write in BIO_f_linebuffer on short writes. (CVE-2025-68160) Unauthenticated/unencrypted trailing bytes with low-level OCB function calls. (CVE-2025-69418) Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion. (CVE-2025-69419) Missing ASN1_TYPE validation in TS_RESP_verify_response() function. (CVE-2025-69420) NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function. (CVE-2025-69421) Missing ASN1_TYPE validation in PKCS#12 parsing. (CVE-2026-22795) ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function. (CVE-2026-22796)

These are all security issues fixed in the libopenssl-3-devel-3.5.3-2.1 package on the GA media of openSUSE Tumbleweed.

This update for openssl-3 fixes the following issues:

Security fixes:

• CVE-2025-11187: Improper validation of PBMAC1 parameters in PKCS#12 MAC verification (bsc#1256829).
• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256830).
• CVE-2025-15468: NULL dereference in SSL_CIPHER_find() function on unknown cipher ID (bsc#1256831).
• CVE-2025-15469: "openssl dgst" one-shot codepath silently truncates inputs >16MB (bsc#1256832).
• CVE-2025-66199: TLS 1.3 CompressedCertificate excessive memory allocation (bsc#1256833).
• CVE-2025-68160: Heap out-of-bounds write in BIO_f_linebuffer on short writes (bsc#1256834).
• CVE-2025-69418: Unauthenticated/unencrypted trailing bytes with low-level OCB function calls (bsc#1256835).
• CVE-2025-69419: Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion (bsc#1256836).
• CVE-2025-69420: Missing ASN1_TYPE validation in TS_RESP_verify_response() function (bsc#1256837).
• CVE-2025-69421: NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function (bsc#1256838).
• CVE-2026-22795: Missing ASN1_TYPE validation in PKCS#12 parsing (bsc#1256839).
• CVE-2026-22796: ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function (bsc#1256840).

Other fixes:

• Enable livepatching support for ppc64le (bsc#1257274).

This update for openssl-3-x86_64-v3-livepatches fixes the following issues:

Changes in openssl-3-x86_64-v3-livepatches:

• Add package for libopenssl3-x86-64-v3-3.5.0 (bsc#1259271).

Fixed:

• CVE-2025-11187: Fixed Improper validation of PBMAC1 parameters in PKCS#12 MAC verification (bsc#1256878).
• CVE-2025-15467: Fixed Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256876).
• CVE-2025-15468: Fixed NULL dereference in SSL_CIPHER_find() function on unknown cipher ID (bsc#1256880).
• CVE-2025-9230: Fixed Out-of-bounds read & write in RFC 3211 KEK Unwrap (CVE-2025-9230) (bsc#1250410).

This update for openssl-3 fixes the following issues:

• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256830).
• CVE-2025-68160: Heap out-of-bounds write in BIO_f_linebuffer on short writes (bsc#1256834).
• CVE-2025-69418: Unauthenticated/unencrypted trailing bytes with low-level OCB function calls (bsc#1256835).
• CVE-2025-69419: Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion (bsc#1256836).
• CVE-2025-69420: Missing ASN1_TYPE validation in TS_RESP_verify_response() function (bsc#1256837).
• CVE-2025-69421: NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function (bsc#1256838).
• CVE-2026-22795: Missing ASN1_TYPE validation in PKCS#12 parsing (bsc#1256839).
• CVE-2026-22796: ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function (bsc#1256840).

This update for openssl-3 fixes the following issues:

• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256830).
• CVE-2025-68160: Heap out-of-bounds write in BIO_f_linebuffer on short writes (bsc#1256834).
• CVE-2025-69418: Unauthenticated/unencrypted trailing bytes with low-level OCB function calls (bsc#1256835).
• CVE-2025-69419: Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion (bsc#1256836).
• CVE-2025-69420: Missing ASN1_TYPE validation in TS_RESP_verify_response() function (bsc#1256837).
• CVE-2025-69421: NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function (bsc#1256838).
• CVE-2026-22795: Missing ASN1_TYPE validation in PKCS#12 parsing (bsc#1256839).
• CVE-2026-22796: ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function (bsc#1256840).

This update for openssl-3 fixes the following issues:

• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256830).
• CVE-2025-68160: Heap out-of-bounds write in BIO_f_linebuffer on short writes (bsc#1256834).
• CVE-2025-69418: Unauthenticated/unencrypted trailing bytes with low-level OCB function calls (bsc#1256835).
• CVE-2025-69419: Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion (bsc#1256836).
• CVE-2025-69420: Missing ASN1_TYPE validation in TS_RESP_verify_response() function (bsc#1256837).
• CVE-2025-69421: NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function (bsc#1256838).
• CVE-2026-22795: Missing ASN1_TYPE validation in PKCS#12 parsing (bsc#1256839).
• CVE-2026-22796: ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function (bsc#1256840).

This update for openssl-3 fixes the following issues:

• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256830).
• CVE-2025-68160: Heap out-of-bounds write in BIO_f_linebuffer on short writes (bsc#1256834).
• CVE-2025-69418: Unauthenticated/unencrypted trailing bytes with low-level OCB function calls (bsc#1256835).
• CVE-2025-69419: Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion (bsc#1256836).
• CVE-2025-69420: Missing ASN1_TYPE validation in TS_RESP_verify_response() function (bsc#1256837).
• CVE-2025-69421: NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function (bsc#1256838).
• CVE-2026-22795: Missing ASN1_TYPE validation in PKCS#12 parsing (bsc#1256839).
• CVE-2026-22796: ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function (bsc#1256840).

This update for openssl-3 fixes the following issues:

Security fixes:

• CVE-2025-11187: Improper validation of PBMAC1 parameters in PKCS#12 MAC verification (bsc#1256829).
• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256830).
• CVE-2025-15468: NULL dereference in SSL_CIPHER_find() function on unknown cipher ID (bsc#1256831).
• CVE-2025-15469: "openssl dgst" one-shot codepath silently truncates inputs >16MB (bsc#1256832).
• CVE-2025-66199: TLS 1.3 CompressedCertificate excessive memory allocation (bsc#1256833).
• CVE-2025-68160: Heap out-of-bounds write in BIO_f_linebuffer on short writes (bsc#1256834).
• CVE-2025-69418: Unauthenticated/unencrypted trailing bytes with low-level OCB function calls (bsc#1256835).
• CVE-2025-69419: Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion (bsc#1256836).
• CVE-2025-69420: Missing ASN1_TYPE validation in TS_RESP_verify_response() function (bsc#1256837).
• CVE-2025-69421: NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function (bsc#1256838).
• CVE-2026-22795: Missing ASN1_TYPE validation in PKCS#12 parsing (bsc#1256839).
• CVE-2026-22796: ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function (bsc#1256840).

Other fixes:

• Enable livepatching support for ppc64le (bsc#1257274).

This update for openssl-3 fixes the following issues:

Security fixes:

• CVE-2025-11187: Improper validation of PBMAC1 parameters in PKCS#12 MAC verification (bsc#1256829).
• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256830).
• CVE-2025-15468: NULL dereference in SSL_CIPHER_find() function on unknown cipher ID (bsc#1256831).
• CVE-2025-15469: "openssl dgst" one-shot codepath silently truncates inputs >16MB (bsc#1256832).
• CVE-2025-66199: TLS 1.3 CompressedCertificate excessive memory allocation (bsc#1256833).
• CVE-2025-68160: Heap out-of-bounds write in BIO_f_linebuffer on short writes (bsc#1256834).
• CVE-2025-69418: Unauthenticated/unencrypted trailing bytes with low-level OCB function calls (bsc#1256835).
• CVE-2025-69419: Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion (bsc#1256836).
• CVE-2025-69420: Missing ASN1_TYPE validation in TS_RESP_verify_response() function (bsc#1256837).
• CVE-2025-69421: NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function (bsc#1256838).
• CVE-2026-22795: Missing ASN1_TYPE validation in PKCS#12 parsing (bsc#1256839).
• CVE-2026-22796: ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function (bsc#1256840).

Other fixes:

• Enable livepatching support for ppc64le (bsc#1257274).

This update for openssl-3 fixes the following issues:

• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256830).
• CVE-2025-68160: Heap out-of-bounds write in BIO_f_linebuffer on short writes (bsc#1256834).
• CVE-2025-69418: Unauthenticated/unencrypted trailing bytes with low-level OCB function calls (bsc#1256835).
• CVE-2025-69419: Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion (bsc#1256836).
• CVE-2025-69420: Missing ASN1_TYPE validation in TS_RESP_verify_response() function (bsc#1256837).
• CVE-2025-69421: NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function (bsc#1256838).
• CVE-2026-22795: Missing ASN1_TYPE validation in PKCS#12 parsing (bsc#1256839).
• CVE-2026-22796: ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function (bsc#1256840).

This update for openssl-3 fixes the following issues:

• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256830).
• CVE-2025-68160: Heap out-of-bounds write in BIO_f_linebuffer on short writes (bsc#1256834).
• CVE-2025-69418: Unauthenticated/unencrypted trailing bytes with low-level OCB function calls (bsc#1256835).
• CVE-2025-69419: Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion (bsc#1256836).
• CVE-2025-69420: Missing ASN1_TYPE validation in TS_RESP_verify_response() function (bsc#1256837).
• CVE-2025-69421: NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function (bsc#1256838).
• CVE-2026-22795: Missing ASN1_TYPE validation in PKCS#12 parsing (bsc#1256839).
• CVE-2026-22796: ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function (bsc#1256840).

This update for openssl-3-livepatches fixes the following issues:

• CVE-2025-11187: Fixed improper validation of PBMAC1 parameters in PKCS#12 MAC verification (bsc#1256878).
• CVE-2025-15467: Fixed stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256876).
• CVE-2025-15468: Fixed NULL dereference in SSL_CIPHER_find() function on unknown cipher ID (bsc#1256880).
• CVE-2025-9230: Fixed out-of-bounds read & write in RFC 3211 KEK Unwrap (bsc#1250410).

This update for openssl-3-livepatches fixes the following issues:

• CVE-2025-11187: Fixed improper validation of PBMAC1 parameters in PKCS#12 MAC verification (bsc#1256878).
• CVE-2025-15467: Fixed stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256876).
• CVE-2025-15468: Fixed NULL dereference in SSL_CIPHER_find() function on unknown cipher ID (bsc#1256880).
• CVE-2025-9230: Fixed out-of-bounds read & write in RFC 3211 KEK Unwrap (bsc#1250410).

This update for openssl-3-x86_64-v3-livepatches fixes the following issues:

Changes in openssl-3-x86_64-v3-livepatches:

• Add package for libopenssl3-x86-64-v3-3.5.0 (bsc#1259271).

Fixed:

• CVE-2025-11187: Fixed Improper validation of PBMAC1 parameters in PKCS#12 MAC verification (bsc#1256878).
• CVE-2025-15467: Fixed Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256876).
• CVE-2025-15468: Fixed NULL dereference in SSL_CIPHER_find() function on unknown cipher ID (bsc#1256880).
• CVE-2025-9230: Fixed Out-of-bounds read & write in RFC 3211 KEK Unwrap (CVE-2025-9230) (bsc#1250410).

This update for openssl-3-livepatches fixes the following issues

• CVE-2025-11187: Improper validation of PBMAC1 parameters in PKCS#12 MAC verification (bsc#1256878).
• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256876).
• CVE-2025-15468: NULL dereference in SSL_CIPHER_find() function on unknown cipher ID (bsc#1256880).
• CVE-2026-45447: Heap Use-After-Free in OpenSSL PKCS7_verify() (bsc#1266389, bsc#1266357).

This update for openssl-3-livepatches fixes the following issues:

• CVE-2025-11187: Improper validation of PBMAC1 parameters in PKCS#12 MAC verification (bsc#1256878).
• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256876).
• CVE-2025-15468: NULL dereference in SSL_CIPHER_find() function on unknown cipher ID (bsc#1256880).
• CVE-2026-45447: Heap Use-After-Free in OpenSSL PKCS7_verify() (bsc#1266389, bsc#1266357).

This update for openssl-3-livepatches fixes the following issues

• CVE-2025-11187: Improper validation of PBMAC1 parameters in PKCS#12 MAC verification (bsc#1256878).
• CVE-2025-15467: Stack buffer overflow in CMS AuthEnvelopedData parsing (bsc#1256876).
• CVE-2025-15468: NULL dereference in SSL_CIPHER_find() function on unknown cipher ID (bsc#1256880).
• CVE-2026-45447: Heap Use-After-Free in OpenSSL PKCS7_verify() (bsc#1266389, bsc#1266357).

Stanislav Fort, Petr Šimeček, and Hamza discovered that OpenSSL incorrectly validated PBMAC1 parameters when doing PKCS#12 MAC verification. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. This issue only affected Ubuntu 25.10. (CVE-2025-11187)

Stanislav Fort discovered that OpenSSL incorrectly parsed CMS AuthEnvelopedData messages. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2025-15467)

Stanislav Fort discovered that OpenSSL incorrectly handled memory in the SSL_CIPHER_find() function. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. This issue only affected Ubuntu 25.10. (CVE-2025-15468)

Stanislav Fort discovered that the OpenSSL "openssl dgst" command line tool incorrectly truncated data to 16MB. An attacker could posibly use this issue to hide unauthenticated data beyond the 16MB limit. This issue only affected Ubuntu 25.10. (CVE-2025-15469)

Tomas Dulka and Stanislav Fort discovered that OpenSSL incorrectly handled memory with TLS 1.3 connections using certificate compression. An attacker could possibly use this issue to consume resources, leading to a denial of service. This issue only affected Ubuntu 25.10. (CVE-2025-66199)

Petr Simecek and Stanislav Fort discovered that OpenSSL incorrectly handled memory when writing large data into a BIO chain. An attacker could possibly use this issue to consume resources, leading to a denial of service. (CVE-2025-68160)

Stanislav Fort discovered that the OpenSSL OCB API could incorrectly leave final partial blocks unencrypted and unauthenticated. An attacker could possibly use this issue to read or tamper with the affected final bytes. (CVE-2025-69418)

Stanislav Fort discovered that OpenSSL incorrectly handled the PKCS12_get_friendlyname() utf-8 conversion. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2025-69419)

Luigino Camastra discovered that OpenSSL incorrectly handled ASN1_TYPE validation in the TS_RESP_verify_response() function. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2025-69420)

Luigino Camastra discovered that OpenSSL incorrectly handled memory in the PKCS12_item_decrypt_d2i_ex function. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2025-69421)

Luigino Camastra discovered that OpenSSL incorrectly handled ASN1_TYPE validation in PKCS#12 parsing. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2026-22795)

Luigino Camastra discovered that OpenSSL incorrectly handled ASN1_TYPE validation in the PKCS7_digest_from_attributes() function. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2026-22796)