Stack buffer overflow in CMS (Auth)EnvelopedData parsing (CVE-2025-15467)
Published Last modified Sources: BSI, Red Hat, Ubuntu, CVE.org, SUSE, Siemens ProductCERT, Debian
What is affected, what to do
A flaw was found in OpenSSL. A remote attacker can exploit a stack buffer overflow vulnerability by supplying a crafted Cryptographic Message Syntax (CMS) message with an oversized Initialization Vector (IV) when parsing AuthEnvelopedData structures that use Authenticated Encryption with Associated Data (AEAD) ciphers such as AES-GCM.
An exploit is publicly available. Update OpenSSL to version 3.6.1, OpenSSL to version 3.5.5, OpenSSL to version 3.4.4.
- Affected
- OpenSSL
lt 3.6.0..3.6.1 - OpenSSL
lt 3.5.0..3.5.5 - OpenSSL
lt 3.4.0..3.4.4 - OpenSSL
lt 3.3.0..3.3.6 - OpenSSL
lt 3.0.0..3.0.19
- OpenSSL
- Fixed in
- OpenSSL
3.6.1 - OpenSSL
3.5.5 - OpenSSL
3.4.4 - OpenSSL
3.3.6 - OpenSSL
3.0.19
- OpenSSL
Not sure whether and how you are affected? Ask a question about this vulnerability
Metrics
8.8
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
8.8
CVSS v3
Severity High on the scale from 0 to 10.
Source: BSI, Red Hat, Ubuntu, CVE.org, SUSE, Siemens ProductCERT, Debian
74.8 %
EPSS score
High — model estimates ≥ 50% chance of real-world exploitation within 30 days.
Source: FIRST EPSS, percentile 99.50
Show all metrics
- Severity
- High
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 136.91 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- PoC (publicly reported)
XIEM Effective CVSS
XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.
Read in glossary- 8.8 Methodology
CVSS v3
CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.
Read in glossary- 8.8
EPSS score
The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.
Read in glossary- 74.8 %
- High — model estimates ≥ 50% chance of real-world exploitation within 30 days.
EPSS percentile
The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.
Read in glossary- 99.50
- Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
- CISA assessment (SSVC)
- Exploitation: proof of concept · automatable · Technical impact: total
- Source: CISA Vulnrichment, as of 19 March 2026
CWE
CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.
Read in glossary- CWE-787
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
A flaw was found in OpenSSL. A remote attacker can exploit a stack buffer overflow vulnerability by supplying a crafted Cryptographic Message Syntax (CMS) message with an oversized Initialization Vector (IV) when parsing AuthEnvelopedData structures that use Authenticated Encryption with Associated Data (AEAD) ciphers such as AES-GCM. This can lead to a crash, causing a Denial of Service (DoS), or potentially allow for remote code execution.
Source: BSI WID Portal, BSI CSAF, redhat_csaf, Ubuntu Security Notices, cvelistv5, NVD (NIST), suse_csaf, siemens_advisory, CVE.org (MITRE), Debian Security Advisories
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| OpenSSL | OpenSSL |
|
|
| openssl | openssl |
|
|
| IBM | Security Verify Access |
|
|
| Oracle | Communications |
|
|
| Oracle | JD Edwards |
|
|
| Oracle | MySQL |
|
|
| Xerox | FreeFlow Print Server |
|
|
Vendors and products
Affected operating systems
| Linux | debian | openssl | bookworm |
| Linux | debian | openssl | trixie |
| Linux | ubuntu | openssl | jammy |
| Linux | ubuntu | openssl | noble |
| Linux | ubuntu | openssl | questing |
Weakness classes (CWE)
CWE-787Out-of-bounds Write
Base
The product writes data past the end, or before the beginning, of the intended buffer.
Entry at MITRE CWE-787
Public exploit references
Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.
| GitHub | guiimoraes/CVE-2025-15467 (opens in a new tab)github.com | PoC (publicly reported)reported, not verified | — |
References & sources
- openssl-library.orgOpenSSL AdvisoryVendor advisory
- github.com3.6.1 git commitPatch
- github.com3.5.5 git commitPatch
- github.com3.4.4 git commitPatch
- github.com3.3.6 git commitPatch
- github.com3.0.19 git commitPatch
- openwall.comlists/oss-security/2026/01/27/10
- openwall.comlists/oss-security/2026/02/25/6
- github.comguiimoraes/CVE-2025-15467Exploit
- Siemens ProductCERTproductcert/html/ssa-434797.html
- Siemens ProductCERTproductcert/html/ssa-734552.html
- access.redhat.comsecurity/cve/CVE-2025-15467Vulnerability database, x_refsource_REDHAT
- bugzilla.redhat.comRHBZ#2430376Issue tracking, x_refsource_REDHAT
- security.access.redhat.comdata/csaf/v2/vex/2025/cve-2025-15467.jsonx_sadp-csaf-vex
- access.redhat.comerrata/RHSA-2026:3415Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:2974Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:4419Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:2659Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:2671Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:2072Vendor advisory, x_refsource_REDHAT
Changes to this CVE
Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).
Record modifiedSiemens ADP
1 individual change: Affected versions (publisher)
Show the original change
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) added —Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2025/15xxx/CVE-2025-15467.json">CVE-2025-15467</a>Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Record modifiedCVE Program
Show 6 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —http://www.openwall.com/lists/oss-security/2026/01/27/10Reference added —http://www.openwall.com/lists/oss-security/2026/02/25/6Reference removed http://www.openwall.com/lists/oss-security/2026/01/27/10—Reference removed http://www.openwall.com/lists/oss-security/2026/02/25/6—Reference type removed http://www.openwall.com/lists/oss-security/2026/01/27/10 Types: Mailing List—Reference type removed http://www.openwall.com/lists/oss-security/2026/02/25/6 Types: Mailing List—Source identifier: af854a3a-2127-422b-91ae-364da2661108
Record modifiedRed Hat ADP
Show 59 original changes
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) added —Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2025/15xxx/CVE-2025-15467.json">CVE-2025-15467</a>Reference added —https://access.redhat.com/errata/RHSA-2026:1472Reference added —https://access.redhat.com/errata/RHSA-2026:1473Reference added —https://access.redhat.com/errata/RHSA-2026:1496Reference added —https://access.redhat.com/errata/RHSA-2026:1503Reference added —https://access.redhat.com/errata/RHSA-2026:1519Reference added —https://access.redhat.com/errata/RHSA-2026:1594Reference added —https://access.redhat.com/errata/RHSA-2026:1733Reference added —https://access.redhat.com/errata/RHSA-2026:1736Reference added —https://access.redhat.com/errata/RHSA-2026:2072Reference added —https://access.redhat.com/errata/RHSA-2026:2077Reference added —https://access.redhat.com/errata/RHSA-2026:2485Reference added —https://access.redhat.com/errata/RHSA-2026:2563Reference added —https://access.redhat.com/errata/RHSA-2026:2633Reference added —https://access.redhat.com/errata/RHSA-2026:2659Reference added —https://access.redhat.com/errata/RHSA-2026:2671Reference added —https://access.redhat.com/errata/RHSA-2026:2844Reference added —https://access.redhat.com/errata/RHSA-2026:2974Reference added —https://access.redhat.com/errata/RHSA-2026:2995Reference added —https://access.redhat.com/errata/RHSA-2026:3228Reference added —https://access.redhat.com/errata/RHSA-2026:3415Reference added —https://access.redhat.com/errata/RHSA-2026:3461Reference added —https://access.redhat.com/errata/RHSA-2026:3462Reference added —https://access.redhat.com/errata/RHSA-2026:4419Reference added —https://access.redhat.com/errata/RHSA-2026:4943Reference added —https://access.redhat.com/errata/RHSA-2026:6481Reference added —https://access.redhat.com/errata/RHSA-2026:7261Reference added —https://access.redhat.com/security/cve/CVE-2025-15467Reference added —https://bugzilla.redhat.com/show_bug.cgi?id=2430376Reference added —https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-15467.jsonReference removed https://access.redhat.com/errata/RHSA-2026:1472—Reference removed https://access.redhat.com/errata/RHSA-2026:1473—Reference removed https://access.redhat.com/errata/RHSA-2026:1496—Reference removed https://access.redhat.com/errata/RHSA-2026:1503—Reference removed https://access.redhat.com/errata/RHSA-2026:1519—Reference removed https://access.redhat.com/errata/RHSA-2026:1594—Reference removed https://access.redhat.com/errata/RHSA-2026:1733—Reference removed https://access.redhat.com/errata/RHSA-2026:1736—Reference removed https://access.redhat.com/errata/RHSA-2026:2072—Reference removed https://access.redhat.com/errata/RHSA-2026:2077—Reference removed https://access.redhat.com/errata/RHSA-2026:2485—Reference removed https://access.redhat.com/errata/RHSA-2026:2563—Reference removed https://access.redhat.com/errata/RHSA-2026:2633—Reference removed https://access.redhat.com/errata/RHSA-2026:2659—Reference removed https://access.redhat.com/errata/RHSA-2026:2671—Reference removed https://access.redhat.com/errata/RHSA-2026:2844—Reference removed https://access.redhat.com/errata/RHSA-2026:2974—Reference removed https://access.redhat.com/errata/RHSA-2026:2995—Reference removed https://access.redhat.com/errata/RHSA-2026:3228—Reference removed https://access.redhat.com/errata/RHSA-2026:3415—Reference removed https://access.redhat.com/errata/RHSA-2026:3461—Reference removed https://access.redhat.com/errata/RHSA-2026:3462—Reference removed https://access.redhat.com/errata/RHSA-2026:4419—Reference removed https://access.redhat.com/errata/RHSA-2026:4943—Reference removed https://access.redhat.com/errata/RHSA-2026:6481—Reference removed https://access.redhat.com/errata/RHSA-2026:7261—Reference removed https://access.redhat.com/security/cve/CVE-2025-15467—Reference removed https://bugzilla.redhat.com/show_bug.cgi?id=2430376—Reference removed https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-15467.json—Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedopenssl.org
New references:- https://github.com/openssl/openssl/commit/2c8f0e5fa9b6ee5508a0349e4572ddb74db5a703
- https://github.com/openssl/openssl/commit/5f26d4202f5b89664c5c3f3c62086276026ba9a9
- https://github.com/openssl/openssl/commit/6ced0fe6b10faa560e410e3ee8d6c82f06c65ea3
- https://github.com/openssl/openssl/commit/ce39170276daec87f55c39dad1f629b56344429e
and 2 more references
Show 18 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —https://github.com/openssl/openssl/commit/2c8f0e5fa9b6ee5508a0349e4572ddb74db5a703Reference added —https://github.com/openssl/openssl/commit/5f26d4202f5b89664c5c3f3c62086276026ba9a9Reference added —https://github.com/openssl/openssl/commit/6ced0fe6b10faa560e410e3ee8d6c82f06c65ea3Reference added —https://github.com/openssl/openssl/commit/ce39170276daec87f55c39dad1f629b56344429eReference added —https://github.com/openssl/openssl/commit/d0071a0799f20cc8101730145349ed4487c268dcReference added —https://openssl-library.org/news/secadv/20260127.txtReference removed https://github.com/openssl/openssl/commit/2c8f0e5fa9b6ee5508a0349e4572ddb74db5a703—Reference removed https://github.com/openssl/openssl/commit/5f26d4202f5b89664c5c3f3c62086276026ba9a9—Reference removed https://github.com/openssl/openssl/commit/6ced0fe6b10faa560e410e3ee8d6c82f06c65ea3—Reference removed https://github.com/openssl/openssl/commit/ce39170276daec87f55c39dad1f629b56344429e—Reference removed https://github.com/openssl/openssl/commit/d0071a0799f20cc8101730145349ed4487c268dc—Reference removed https://openssl-library.org/news/secadv/20260127.txt—Reference type removed https://github.com/openssl/openssl/commit/2c8f0e5fa9b6ee5508a0349e4572ddb74db5a703 Types: Patch—Reference type removed https://github.com/openssl/openssl/commit/5f26d4202f5b89664c5c3f3c62086276026ba9a9 Types: Patch—Reference type removed https://github.com/openssl/openssl/commit/6ced0fe6b10faa560e410e3ee8d6c82f06c65ea3 Types: Patch—Reference type removed https://github.com/openssl/openssl/commit/ce39170276daec87f55c39dad1f629b56344429e Types: Patch—Reference type removed https://github.com/openssl/openssl/commit/d0071a0799f20cc8101730145349ed4487c268dc Types: Patch—Reference type removed https://openssl-library.org/news/secadv/20260127.txt Types: Vendor Advisory—Source identifier: openssl-security@openssl.org
Record modifiedCISA ADP
New references:Show 3 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —https://github.com/guiimoraes/CVE-2025-15467Reference removed https://github.com/guiimoraes/CVE-2025-15467—Reference type removed https://github.com/guiimoraes/CVE-2025-15467 Types: Exploit, Third Party Advisory—Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Show 8 older changes
Record modifiedSiemens ADP
Show 4 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —https://cert-portal.siemens.com/productcert/html/ssa-434797.htmlReference added —https://cert-portal.siemens.com/productcert/html/ssa-734552.htmlReference removed https://cert-portal.siemens.com/productcert/html/ssa-434797.html—Reference removed https://cert-portal.siemens.com/productcert/html/ssa-734552.html—Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Record modifiedRed Hat ADP
1 individual change: Affected versions (publisher)
Show the original change
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) changed Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedSiemens ADP
1 individual change: Affected versions (publisher)
Show the original change
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) changed AI Lightweight Inference Server, Connector for Azure, Databus (+270)AI Lightweight Inference Server, Connector for Azure, Databus (+284)Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Record modifiedRed Hat ADP
1 individual change: Affected versions (publisher)
Show the original change
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) changed Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
1 individual change: Affected versions (publisher)
Show the original change
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) changed Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
1 individual change: Affected versions (publisher)
Show the original change
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) changed Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
1 individual change: Affected versions (publisher)
Show the original change
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) changed Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
1 individual change: Affected versions (publisher)
Show the original change
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) changed Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9 (+60)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Embed badge
Show the severity and KEV status of this vulnerability on your site – with a link back here. The image is updated hourly.
<a href="https://intel.neosec.eu/en/cve/CVE-2025-15467"><img src="https://intel.neosec.eu/badge/cve/CVE-2025-15467.svg?lang=en" alt="CVE-2025-15467 – NEOSEC Intel" height="20"></a>