Description
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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | 3.6.0 – < 3.6.1, 3.5.0 – < 3.5.5, 3.4.0 – < 3.4.4, 3.3.0 – < 3.3.6, 3.0.0 – < 3.0.19 | 3.6.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openssl | 3.5.5-1 | — |
| Debian 13 | openssl | 3.5.4-1~deb13u2 | DSA-6113-1 |
| Debian 12 | openssl | 3.0.18-1~deb12u2 | DSA-6113-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | edk2 +1 | No fix yet | — |
| Ubuntu 26.04 LTS | edk2 +1 | No fix yet | — |
| Ubuntu 26.04 LTS | openssl | 3.5.5-1ubuntu1 | — |
| Ubuntu 25.10 | edk2 | No fix yet | — |
| Ubuntu 25.10 | openssl | 3.5.3-1ubuntu3 | USN-7980-1 |
| Ubuntu 24.04 LTS | edk2 | No fix yet | — |
| Ubuntu 24.04 LTS | openssl | 3.0.13-0ubuntu3.7 | USN-7980-1 |
| Ubuntu 22.04 LTS | openssl | 3.0.2-0ubuntu1.21 | USN-7980-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 24.04 LTS | openssl-fips | 3.0.13-0ubuntu3.12+Fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | openssl | 3.0.2-0ubuntu1.21+Fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | openssl-fips | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | openssl +1 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | nodejs | No fix yet | — |
| Ubuntu Pro 16.04 LTS | nodejs | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | openssl +3 | 1:3.5.1-7.el10_1 | RHSA-2026:1472 |
| RHEL 9 | openssl +3 | 1:3.5.1-7.el9_7 | RHSA-2026:1473 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | openssl +3 | 1:3.2.2-16.el10_0.6 | RHSA-2026:1496 |
| RHEL 9.6 EUS | openssl +3 | 1:3.2.2-7.el9_6.2 | RHSA-2026:1503 |
| RHEL 9.4 EUS | openssl +3 | 1:3.0.7-29.el9_4.2 | RHSA-2026:1519 |
| RHEL 9.2 E4S | openssl +3 | 1:3.0.7-18.el9_2.3 | RHSA-2026:1594 |
| RHEL 9.0 E4S | openssl +3 | 1:3.0.1-46.el9_0.7 | RHSA-2026:1733 |
| Red Hat Hardened Images 1 | openssl +5 | 3.5.6-0.1.hum1 | RHSA-2026:7261 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | openssl +3 | 1:3.5.1-7.el10_1.alma.1 | ALSA-2026:1472 |
| AlmaLinux 9 | openssl +3 | 1:3.5.1-7.el9_7 | ALSA-2026:1473 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | openssl | 1:3.5.1-7.el10_1 | RLSA-2026:1472 |
| Rocky Linux 9 | openssl | 1:3.5.1-7.el9_7 | RLSA-2026:1473 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | openssl-3 | 3.2.3-150700.5.24.1 | SUSE-SU-2026:0309-1 |
| SLES 15 SP6 | openssl-3 | 3.1.4-150600.5.42.1 | SUSE-SU-2026:0312-1 |
| SLES 15 SP5 | openssl-3 | 3.0.8-150500.5.57.1 | SUSE-SU-2026:0311-1 |
| SLES 15 SP4 | openssl-3 | 3.0.8-150400.4.78.1 | SUSE-SU-2026:0310-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | openssl-3 | 3.5.0-160000.5.1 | SUSE-SU-2026:20223-1 |
| SLES for SAP 16.0 | openssl-3-livepatches | 0.3-160000.1.1 | SUSE-SU-2026:20607-1 |
| SLES for SAP 15 SP6 | openssl-3 | 3.1.4-150600.5.42.1 | SUSE-SU-2026:0312-1 |
| SLES for SAP 15 SP5 | openssl-3 | 3.0.8-150500.5.57.1 | SUSE-SU-2026:0311-1 |
| SLES for SAP 15 SP4 | openssl-3 | 3.0.8-150400.4.78.1 | SUSE-SU-2026:0310-1 |
| SLES 16.0 | openssl-3 | 3.5.0-160000.5.1 | SUSE-SU-2026:20223-1 |
| SLES 16.0 | openssl-3-livepatches | 0.3-160000.1.1 | SUSE-SU-2026:20607-1 |
| SLE Micro 6.2 | openssl-3 | 3.5.0-160000.5.1 | SUSE-SU-2026:20211-1 |
| SLE Micro 6.2 | openssl-3-livepatches | 0.3-160000.1.1 | SUSE-SU-2026:20542-1 |
| SLE Micro 6.1 | openssl-3 | 3.1.4-slfo.1.1_8.1 | SUSE-SU-2026:20373-1 |
| SLE Micro 6.1 | openssl-3-livepatches | 0.4-slfo.1.1_1.1 | SUSE-SU-2026:22143-1 |
| SLE Micro 6.0 | openssl-3 | 3.1.4-11.1 | SUSE-SU-2026:20349-1 |
| SLE Micro 5.4 | openssl-3 | 3.0.8-150400.4.78.1 | SUSE-SU-2026:0310-1 |
| SLE Micro 5.3 | openssl-3 | 3.0.8-150400.4.78.1 | SUSE-SU-2026:0310-1 |
| SLE Live Patching 15 SP7 | openssl-3-livepatches | 0.4-150700.16.6.1 | SUSE-SU-2026:2662-1 |
| SLE Live Patching 15 SP6 | openssl-3-livepatches | 0.4-150600.13.11.1 | SUSE-SU-2026:2411-1 |
| SLE HPC 15 SP5 | openssl-3 | 3.0.8-150500.5.57.1 | SUSE-SU-2026:0311-1 |
| SLE HPC 15 SP4 | openssl-3 | 3.0.8-150400.4.78.1 | SUSE-SU-2026:0310-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-3 | 3.5.3-2.1 | openSUSE-SU-2026:10237-1 |
| openSUSE Leap 16.0 | openssl-3 | 3.5.0-160000.5.1 | openSUSE-SU-2026:20152-1 |
| openSUSE Leap 15.6 | openssl-3 | 3.1.4-150600.5.42.1 | SUSE-SU-2026:0312-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openssl | 3.5.5-r0 | — |
| Alpine v3.23 | openssl | 3.5.5-r0 | — |
| Alpine v3.22 | openssl | 3.5.5-r0 | — |
| Alpine v3.21 | openssl | 3.3.6-r0 | — |
| Alpine v3.20 | openssl | 3.3.6-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.17 | openssl | 3.0.19-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | openssl +5 | 1:3.2.2-1.amzn2023.0.4 | ALAS2023-2026-1406 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | edk2 | 20240524git3e722403cd16-14 | — |
| Azure Linux 3 | openssl | 3.3.5-3 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | openssl +3 | 1:3.5.1-7.0.1.el10_1 | ELSA-2026-1472 |
| Oracle Linux 9 | openssl +3 | 1:3.5.1-7.0.1.el9_7 | ELSA-2026-50075, ELSA-2026-1473 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | openssl | 3.6.1-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 5 repositories
-
guiimoraes/CVE-2025-15467 ★ 15 · Jan 30, 2026
Command Execution PoC for OpenSSL Stack buffer overflow CVE-2025-15467
-
balgan/CVE-2025-15467 ★ 8 · Jan 28, 2026
Working DoS for CVE-2025-15467 and a docker container to test against
-
mr-r3b00t/CVE-2025-15467 ★ 1 · Feb 3, 2026
discovery tool (powershell)
-
WostGit/cve-2025-15467-crash ★ 0 · Apr 7, 2026
-
materaj2/cve-2025-15467 ★ 0 · Mar 14, 2026
Exploit script for cve-2025-15467
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 50
- WID-SEC-2026-4081 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- WID-SEC-2026-1199 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- SSA-434797 SSA-434797: Buffer Overflow Vulnerability in OpenSSL affecting Siemens Products Siemens ProductCERT · Nov 10, 2026
- SA26P003 OpenSSL Vulnerabilities in B&R products ABB PSIRT · Nov 9, 2026
- WID-SEC-2026-0234 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2026
- ALSA-2026:1472 Important: openssl security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:1473 Important: openssl security update AlmaLinux Security Advisories · Oct 29, 2026
- USN-7980-1 openssl vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- NCSC-2026-0446 Kwetsbaarheden verholpen in Oracle JD Edwards EnterpriseOne NCSC-NL (Netherlands) · Oct 22, 2026
- NCSC-2026-0441 Kwetsbaarheden verholpen in Oracle MySQL NCSC-NL (Netherlands) · Oct 21, 2026
- WID-SEC-2026-4080 Oracle JD Edwards: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 20, 2026
- FSA-202602 Multiple OpenSSL vulnerabilities affect Festo AX OS in CEPE CERT@VDE · Oct 20, 2026
- RHSA-2026:7261 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:1472 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:1473 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:1733 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:1594 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:1519 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:1503 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:1496 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- WID-SEC-2026-2253 IBM Security Verify Access: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- ICSA-26-174-03 Siemens Products using OpenSSL CISA ICS & IT advisories · Sep 15, 2026
- VDE-2026-088 METTLER TOLEDO: LabX Standard and Enterprise Report on External Component Analysis - v21.4 CERT@VDE · Sep 10, 2026
- NCSC-2026-0346 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Sep 8, 2026
- ICSA-26-209-01 Siemens Desigo CC CISA ICS & IT advisories · Jul 28, 2026
- WID-SEC-2026-1730 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 16, 2026
- SSA-734552 SSA-734552: Buffer Overflow Vulnerability in OpenSSL Affecting Desigo CC Siemens ProductCERT · Jul 14, 2026
- VDE-2026-049 Balluff GmbH: Multiple Vulnerabilities Affecting BNI EGW-720-007-K095 and BAV MA-NC-00025-01 CERT@VDE · Jun 30, 2026
- SUSE-SU-2026:2662-1 Security update for openssl-3-livepatches SUSE / openSUSE Security Updates · Jun 27, 2026
- SUSE-SU-2026:22143-1 Security update for openssl-3-livepatches SUSE / openSUSE Security Updates · Jun 18, 2026
- SUSE-SU-2026:2411-1 Security update for openssl-3-livepatches SUSE / openSUSE Security Updates · Jun 17, 2026
- NCSC-2026-0187 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Jun 9, 2026
- VDE-2026-064 METTLER TOLEDO: LabX Standard Report on External Component Analysis - v21.3 CERT@VDE · Jun 9, 2026
- WID-SEC-2026-1723 Oracle Communications Unified Assurance: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 28, 2026
- ICSA-26-132-05 ABB AC500 V3 Stack Buffer Overflow in Cryptographic Message Syntax CISA ICS & IT advisories · May 12, 2026
- WID-SEC-2026-0778 Dell Secure Connect Gateway Policy Manager: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 11, 2026
- VDE-2026-029 METTLER TOLEDO: OpenSSL vulnerability in MX and MR balances CERT@VDE · Apr 23, 2026
- NCSC-2026-0127 Kwetsbaarheden verholpen in Oracle PeopleSoft NCSC-NL (Netherlands) · Apr 22, 2026
- VDE-2026-023 Phoenix Contact: Several products are affected by vulnerabilities found in OpenSSL CERT@VDE · Apr 22, 2026
- WID-SEC-2026-1207 Oracle PeopleSoft: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 21, 2026
- WID-SEC-2026-1194 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 21, 2026
- openSUSE-SU-2026:20152-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10237-1 libopenssl-3-devel-3.5.3-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20349-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20607-1 Security update for openssl-3-livepatches SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20542-1 Security update for openssl-3-livepatches SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20223-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20211-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20373-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Mar 23, 2026
- 3ADR011536 AC500 V3 Stack buffer overflow in Cryptographic Message Syntax ABB PSIRT · Mar 12, 2026
References
- OpenSSL Advisory vendor-advisory
- 3.6.1 git commit patch
- 3.5.5 git commit patch
- 3.4.4 git commit patch
- 3.3.6 git commit patch
- 3.0.19 git commit patch