CVE-2025-15467
High · 8.8CVSS
8.8
EPSS
55.9%
Published
Jan 27, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| AlmaLinux:10 | openssl | 0 | 1:3.5.1-7.el10_1.alma.1 |
| AlmaLinux:10 | openssl-devel | 0 | 1:3.5.1-7.el10_1.alma.1 |
| AlmaLinux:10 | openssl-libs | 0 | 1:3.5.1-7.el10_1.alma.1 |
| AlmaLinux:10 | openssl-perl | 0 | 1:3.5.1-7.el10_1.alma.1 |
| Chainguard | libcrypto3-2.34 | 0 | 3.6.1-r0 |
| Chainguard | openssl | 0 | 3.6.1-r0 |
| Chainguard | openssl-provider-fips | 0 | 0 |
| Chainguard | openssl-provider-fips-3.1.2 | 0 | 0 |
| Chainguard | openssl-provider-fips-3.1.2 | 0 | 3.1.2-r5 |
| Chainguard | openssl-provider-fips-3.4.0 | 0 | 0 |
| Chainguard | openssl-provider-fips-3.4.0 | 0 | 3.4.0-r4 |
| Chainguard | openssl-provider-fips-3.6.0 | 0 | 0 |
| Chainguard | openssl-provider-fips-3.6.0 | 0 | 3.6.0-r2 |
| Mageia:9 | openssl | 0 | 3.0.19-1.mga9 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | openssl-3 | 0 | 3.0.8-150500.5.57.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | openssl-3 | 0 | 3.0.8-150500.5.57.1 |
| SUSE:Linux Enterprise Micro 5.3 | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise Micro 5.4 | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | openssl-3 | 0 | 3.2.3-150700.5.24.1 |
| SUSE:Linux Enterprise Server 15 SP4-LTSS | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise Server 15 SP5-LTSS | openssl-3 | 0 | 3.0.8-150500.5.57.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | openssl-3 | 0 | 3.1.4-150600.5.42.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | openssl-3 | 0 | 3.0.8-150500.5.57.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | openssl-3 | 0 | 3.1.4-150600.5.42.1 |
| Wolfi | openssl | 0 | 3.6.1-r0 |
| openSUSE:Leap 15.6 | openssl-3 | 0 | 3.1.4-150600.5.42.1 |
| openSUSE:Leap 16.0 | openssl-3 | 0 | 3.5.0-160000.5.1 |
| openSUSE:Tumbleweed | openssl-3 | 0 | 3.5.3-2.1 |
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