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OpenSSL CVE-2025-15467

HIGH
Out-of-bounds Write (CWE-787)
2026-01-27 openssl-security@openssl.org
8.8
CVSS 3.1 · Vendor: openssl
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Severity by source

Vendor (openssl) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SUSE
HIGH
qualitative
Red Hat
9.8 HIGH
qualitative

Primary rating from Vendor (openssl).

CVSS VectorVendor: openssl

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

6
Re-analysis Queued
May 07, 2026 - 18:22 vuln.today
cvss_changed
Severity Changed
May 07, 2026 - 18:22 NVD
CRITICAL HIGH
CVSS changed
May 07, 2026 - 18:22 NVD
9.8 (CRITICAL) 8.8 (HIGH)
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
Patch released
Feb 25, 2026 - 22:16 nvd
Patch available
CVE Published
Jan 27, 2026 - 16:16 nvd
CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

OpenSSL has a critical out-of-bounds write when parsing CMS AuthEnvelopedData/EnvelopedData with malicious AEAD parameters, enabling potential RCE.

Technical ContextAI

OpenSSL has a CWE-787 out-of-bounds write when parsing CMS messages with maliciously crafted AEAD parameters. This affects any application processing CMS/PKCS#7 messages.

RemediationAI

Update OpenSSL immediately. This is a high-impact vulnerability affecting the most widely-used TLS library.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
Container private-registry/harbor-core:1.1.1-1.15 Container private-registry/harbor-exporter:1.1.1-1.15 Container private-registry/harbor-jobservice:1.1.1-1.15 Container private-registry/harbor-registry:1.1.1-1.15 Container private-registry/harbor-registryctl:1.1.1-1.15 Container private-registry/harbor-trivy-adapter:1.1.1-1.18 Image SLES15-SP7-Azure-3P Image SLES15-SP7-Azure-Basic Image SLES15-SP7-Azure-Standard Image SLES15-SP7-BYOS-Azure Image SLES15-SP7-BYOS-EC2 Image SLES15-SP7-BYOS-GCE Image SLES15-SP7-CHOST-BYOS-Aliyun Image SLES15-SP7-CHOST-BYOS-Azure Image SLES15-SP7-CHOST-BYOS-EC2 Image SLES15-SP7-CHOST-BYOS-GCE Image SLES15-SP7-CHOST-BYOS-GDC Image SLES15-SP7-CHOST-BYOS-SAP-CCloud Image SLES15-SP7-EC2 Image SLES15-SP7-EC2-ECS-HVM Image SLES15-SP7-GCE Image SLES15-SP7-GCE-3P Image SLES15-SP7-HPC-Azure Image SLES15-SP7-HPC-BYOS-Azure Image SLES15-SP7-HPC-BYOS-EC2 Image SLES15-SP7-HPC-BYOS-GCE Image SLES15-SP7-Hardened-BYOS-Azure Image SLES15-SP7-Hardened-BYOS-EC2 Image SLES15-SP7-Hardened-BYOS-GCE Image SLES15-SP7-SAP-Azure Image SLES15-SP7-SAP-Azure-3P Image SLES15-SP7-SAP-BYOS-Azure Image SLES15-SP7-SAP-BYOS-EC2 Image SLES15-SP7-SAP-BYOS-GCE Image SLES15-SP7-SAP-EC2 Image SLES15-SP7-SAP-GCE Image SLES15-SP7-SAP-GCE-3P Image SLES15-SP7-SAP-Hardened-Azure Image SLES15-SP7-SAP-Hardened-BYOS-Azure Image SLES15-SP7-SAP-Hardened-BYOS-EC2 Image SLES15-SP7-SAP-Hardened-BYOS-GCE Image SLES15-SP7-SAP-Hardened-GCE Image pr_15_7 Affected
Container private-registry/harbor-portal:1.1.1-1.16 Container suse/multi-linux-manager/5.1/x86_64/server-postgresql:5.1.2.6.13.1 Image server-postgresql-image Affected
Container suse/manager/5.0/x86_64/proxy-httpd:latest Container suse/manager/5.0/x86_64/proxy-squid:latest Container suse/manager/5.0/x86_64/proxy-ssh:latest Container suse/manager/5.0/x86_64/server-hub-xmlrpc-api:latest Container suse/manager/5.0/x86_64/server-migration-14-16:latest Affected
Container suse/manager/5.0/x86_64/proxy-salt-broker:latest Container suse/manager/5.0/x86_64/proxy-tftpd:latest Container suse/manager/5.0/x86_64/server-attestation:latest Container suse/manager/5.0/x86_64/server:latest Affected
Container suse/multi-linux-manager/5.1/x86_64/proxy-httpd:5.1.2.8.15.2 Container suse/multi-linux-manager/5.1/x86_64/proxy-squid:5.1.2.8.13.1 Container suse/multi-linux-manager/5.1/x86_64/proxy-ssh:5.1.2.8.13.1 Container suse/multi-linux-manager/5.1/x86_64/server-hub-xmlrpc-api:5.1.2.8.13.1 Container suse/multi-linux-manager/5.1/x86_64/server-migration-14-16:5.1.2.8.13.1 Image proxy-httpd-image Image proxy-squid-image Image proxy-ssh-image Image server-database-migration-image Image server-hub-xmlrpc-api-image Image server-migration-14-16-image Affected

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CVE-2025-15467 vulnerability details – vuln.today

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