CVE-2025-15467

Highest-risk unexploited with PoCs

Exploit code exists, no confirmed in-the-wild activity, ranked by EPSS

Actively Exploited

Confirmed exploited in the wild, sorted by most recently updated

CVSS 8.8EPSS 52%

Published 2026-01-27Updated 2026-03-19

Media 45278PoC

Vulnerability details

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CNAopenssl

EPSS score history

Sources

6 links

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Profile

CVSS

8.8

EPSS

52%

Published

2026-01-27

Updated

2026-03-19

CNA

openssl

Vendors

OpenSSL

1 product

CPEs

cpe:/a:redhat:openshift:4.13::el9

cpe:/a:redhat:openshift:4.14::el9

cpe:/a:redhat:openshift:4.15::el9

cpe:/a:redhat:openshift:4.16::el9

cpe:/a:redhat:openshift:4.17::el9

cpe:/a:redhat:openshift:4.18::el9

cpe:/a:redhat:openshift:4.19::el9

cpe:/a:redhat:openshift:4.20::el9

cpe:/a:redhat:service_interconnect:1::el9

cpe:/o:redhat:enterprise_linux_eus:10.0

cpe:/o:redhat:enterprise_linux:10.1

cpe:/a:redhat:rhel_e4s:9.0::appstream

cpe:/a:redhat:rhel_e4s:9.2::appstream

cpe:/a:redhat:rhel_eus:9.4::appstream

cpe:/a:redhat:rhel_eus:9.6::appstream

cpe:/a:redhat:enterprise_linux:9::appstream

cpe:/o:redhat:rhel_e4s:9.0::baseos

cpe:/o:redhat:rhel_e4s:9.2::baseos

cpe:/o:redhat:rhel_eus:9.4::baseos

cpe:/o:redhat:rhel_eus:9.6::baseos

cpe:/o:redhat:enterprise_linux:9::baseos

cpe:/a:redhat:cost_management:4::el9

cpe:/a:redhat:ai_inference_server:3.2::el9

cpe:/a:redhat:discovery:2::el9

cpe:/a:redhat:hummingbird:1

cpe:/a:redhat:insights_proxy:1.5::el9

cpe:/a:redhat:jboss_core_services:1

cpe:/a:redhat:openshift_devspaces:3.26::el9

cpe:/a:redhat:rhui:5::el9

cpe:/o:redhat:enterprise_linux:10

cpe:/o:redhat:enterprise_linux:6

cpe:/o:redhat:enterprise_linux:7

cpe:/o:redhat:enterprise_linux:8

cpe:/o:redhat:enterprise_linux:9

cpe:/a:redhat:enterprise_linux:9

cpe:/a:redhat:rhel_e4s:9.0

cpe:/a:redhat:rhel_e4s:9.2

cpe:/a:redhat:rhel_eus:9.4

cpe:/a:redhat:rhel_eus:9.6

cpe:/a:redhat:openshift:4

Vulnerability dashboard

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